大学英语四级题库_大学英语题库

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： decreased[听力原文]
In the past, American families tended t...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： significant[听力原文]
The judgment that cigarette smoking i...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： skiing[听力原文]
Almost all Americans are involved with spo...

填空题

The answer is that the economic indicators have a basic fault: they show no difference between resource uses that ________ progress and those uses that will hurt it.

答案： sustain[听力原文]
The answer is that the economic indicator...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： pour[听力原文]
The weather is getting hotter and you"ll be ...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： dependent[解析] 空前的making them financially提示，本空应填形容词，且能与空后的介词o...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： agency[解析] 空前并列的形容词medical和health提示，本空应填名词(短语)，再结合前面的every可知...

填空题

Looking at the basic biological systems, the world is not doing very well. Yet economic indicators show the world is prospering. Despite a slow start at the beginning of the eighties, global economic output increased by more than a fifth during the decade. The economy grew, trade increased, and millions of new jobs were created. How can biological indicators show the ________ of economic indicators

答案： opposite[听力原文]
Looking at the basic biological systems,...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： innocent[解析] 空前的不定冠词an和空后的名词pleasure提示，本空所填词可能是以元音音素开头的形容词或名...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： attractive[解析] 空前的an和空后color提示，本空应填以元音音素开头的形容词。

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： entertainment[解析] 空前的spend on提示，本空应名词(短语)，指在某方面的花费。

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： expressed[解析] 空前的助动词have提示，所填词应为动词(短语)的过去分词。由空后的opinion可推测，所...

填空题

The judge decides whether the suspect should be kept in jail or ________ .

答案： released[听力原文]
The judge decides whether the suspect sh...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： vitamins
[解析] 空前from以及空后的to和ginseng提示，本空应填名词(短语)。

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： take up[解析] 分析句子结构可知，本空所在句缺少谓语，再结合空前的they和并列连词and后面的given知，本...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： take charge of[解析] 分析句子结构可知，本空所在句缺少谓语动词。空前的parents ususally提...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： associated with[解析] 分析句子结构可知，本空应填动词(短语)的分词形式，且能与空后的habit搭配作d...

填空题

Although no form of matter yet discovered moves as fast as or faster than light, scientific experiments have already confirmed that accelerated ________ causes a traveler"s time to be stretched.

答案： motion[听力原文]
Although no form of matter yet discovered ...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： contain[解析] 分析句子结构可知，本空所在从句中缺少谓语动词。从句的主语energy drinks和前后所使用的...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： shown[解析] 空前的is和空后的介词on提示，本空应填动词的分词形式。再结合空前的bowl game compet...

填空题

To arrest a person, the police have to be reasonably sure that a crime has been ________ .

答案： committed[听力原文]
To arrest a person, the police have to ...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： divorce[解析] 分析句子结构可知，本空所在从句缺少谓语动词。复数主语parents和主句为一般现在时态提示，所...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： rare[解析] 空前的a和空后的disease提示，本空应填形容词或名词。由本句中的50 years ago和下句中的...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： aimed at[解析] 空前的are和空后表示各类人群的名词提示，本空应填动词(短语)的分词。

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： devoting[解析] 分析句子结构可知，本空所在句谓语成分不完整。空前的are提示，本空应填动词的分词形式，且能与介...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： estimated[解析] 空前的is与空后that引导的从句提示，本空应填动词(短语)的过去分词或形容词。从句中出现的...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： blame[解析] 分析句子结构可知，本空所在的主句缺少谓语动词。本空的主语children以及全文的一般现在时态提示，...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： awake[解析] 空前的keep和人称代词you提示，所填词可能为形容词或动词(短语)的分词。

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： improve[解析] 空前的不定式符号to和空后的名词circulation提示，本空应填动词(短语)原形，且为及物动...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： unsettled[解析] 空前的感官动词feeling提示，本空应填形容词，充当feeling的表语。

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： common[解析] 空前的最高级the most和空后的名词cause提示，本空应填形容词。

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： limited[解析] 分析句子结构可知，本空所在句谓语部分不完整。空前的助动词has提示，本空应填动词(短语)的过去分...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： especially[解析] 本空所在句句子结构完整，结合本空所在位置可知，所填词应为副词。

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： chronic[解析] 分析句子结构可知，although引导的让步状语从句中的主干完整，空后的名词irritation...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： responsible for[解析] 空前的is提示，本空应填形容词。结合下文的“单亲父母除了给予孩子经济支持外还必须...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： affected[解析] 空前的are和空后的介词by提示，本空应填动词(短语)的过去分词。

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： enormous[解析] 空前的介词with和空后的名词salaries提示，本空应填形容词。句中提到棒球球员的平均薪水...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： compared with[解析] 分析句子结构可知，本空应填动词(短语)的分词，作状语。they指从句中的irrita...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： linked to[解析] 空前的名词短语health risks提示，本空应填动词(短语)的分词，与后面的energy...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： demanding[解析] 空前的very提示，本空应填形容词。this指代上文提到的单亲父母除了给予孩子经济支持外还必...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： annual[解析] 空前的形容词average和空后的名词salary提示，本空应填形容词或名词(短语)。根据前面的b...

填空题

The judgment that cigarette smoking is hazardous to health is the result of more than 30 years of research carded on by hundreds of scientists in this country and abroad. The conclusion that cigarette smoking is a 16 health hazard is supported by every medical and health 17 in the world which is known to have 18 an opinion on the matter.
While cigarette smokers tend to have higher death rates than nonsmokers, 80% of the excess deaths 19 this habit are caused by three major diseases. They are lung cancer, coronary heart disease, and emphysema. Lung cancer was a 20 disease 50 years ago. Today, it is 21 that 60,000 men and women per year in the United States will die of this disease. Among men it is the most 22 cause of death from cancer.
Cigarette smoking is the major cause of lung cancer. Although 23 irritation from certain chemical substances, radiation, viruses, occupational hazards, air pollution, and other environmental factors have been implicated in this disease, they are of small importance 24 cigarette smoking. To those who smoke, however, they can be important in increasing the risks still further. Approximately 90 percent of all primary cancer cases occur in people who smoke cigarettes. Laboratory studies have isolated from tobacco smoke a number of chemical compounds that can cause cancer. In addition, there are elements in smoke that 25 other compounds to promote cancer production.

答案： interact with[解析] 分析句子结构可知，本空所在句缺少谓语动词。分析句意可推测，此处想说的可能是eleme...

填空题

In the past, American families tended to be quite large. Parents raising five or more children were common. Over the years, the size of the family has 26 . One reason for this is the increase in the cost of living. On the average, children attend school for more years than they used to, making them financially 27 on their families longer. Moreover, children nowadays are better dressed and have more money to spend on 28 . The parents usually 29 all the expenses.
Meanwhile, families are less close than they used to be. More and more American mothers work away from home. The break-up of the family occurs when the parents 30 . A lot of children in the US live part of their young lives with only one parent. Children 31 themselves when their parents separate. They grow up feeling 32 as they are moved back and forth between parents.
Usually one parent is 33 raising the children. These single parents must care for the children"s emotional and psychological needs while also supporting them with more money. This is very 34 and leaves very little time for the parent"s own personal interests. Single parents often marry other single parents. In this type of family, 35 children are forced to develop brother or sister relationships.
The situations of many American families today are not good. However, recent signs indicate that things are getting better and the rate of childbirth is rising. Perhaps Americans have learned how important families are.

答案： unrelated[解析] 空后的children提示，此处填名词或形容词。上文中指出，通常情况下单亲父母会和其他的单亲...

填空题

The weather is getting hotter and you"ll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you 36 down your throat. Something that looks cool may not be good for your health.
There are plenty of so-called energy drinks on the market. Most of them have an 37 color and cool name. Their nutrition lists also provide various things from 38 to ginseng.
But after a careful check you may find that most energy drinks 39 high levels of caffeine. These drinks are typically 40 young people, students, busy people and sports players.
Makers sometimes say their drinks make you better at sports and can keep you 41 . But be careful not to drink too much.
Caffeine raises your heartbeat. Because of this, the International Olympic Committee has 42 their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
Research by Australian scientists has found that many teenagers are 43 by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.
There are potential health risks 44 energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.
Teenagers should be 45 consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

答案： discouraged from[解析] 空前的should be提示，本空应填动词(短语)的过去分词，与be构成被动语...

填空题

Almost all Americans are involved with sports in some way. They may play basketball or volleyball or go swimming or go 6 . They may watch football or basketball games on a high school, college, or professional level. Sports may seem like an 7 pleasure, but it is important to look under the surface. In reality, sports have reached a point where they play too large a part in daily life. They 8 too much media time, and give too much power and prestige to athletes.
The overemphasis on sports can be seen most obviously in the vast media coverage of athletic events. It seems as if every bowl game competition, race, and match is 9 on one television channel or another. Many daily papers such as USA Today are 10 more and more space to sports coverage, often in an attempt to 11 circulation. The paper with the biggest sports section is the one people will buy. Our sports craziness is 12 in the prestige given to athletes in America. For one thing, we reward them with 13 salaries. In 1980, for example, baseball players averaged $150,000 a year; the average 14 salary in America was $15,000. Besides their huge salaries, athletes receive the admiration, and sometimes the votes of the public. Ex-players become senators and congressmen. Americans 15 sports, and the sports scene in this country is more popular than ever.

答案： are mad about[解析] 分析句子结构可知，本空所在句缺少谓语，再结合空前的Americans可知，本空应填动...

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