（A）
Daniel Olin was 11 years old when his parents moved to Canada. He liked his new school and made friends there, but then things at home started to change. His mum and dad began to argue and the arguments got worse and worse until one day, Daniel's mum left. With his father working long hours, Daniel felt very lonely and very unhappy. He wanted to escape, to run away. And that's what he did.
Very early one terribly cold morning when the snow was deep on the ground, he packed a bag with some clothes, some chocolate and a map of Canada and set off to a forest. He ran and ran until he could hardly breathe. His feet were heavy with the snow but he still walked on through deep snow, not even watching where he was going.
Then, disaster struck. A rock hidden by the deep snow caught his feet and Daniel fell to the ground. He had broken the bone. He was very cold and was starting to feel tired, but he knew that if he fell asleep in the snow, he would certainly die from the cold.
A tree shook ahead. From within the branches, a pair of yellow eyes watched Daniel. The puma had been following him. A puma is a large wild cat with claws that could tear Daniel into pieces. But instead of moving in for the kill, the puma walked up to Daniel and lay across his chest, arms and legs. Daniel was too frightened to move, but soon the warmth of the animal reached Daniel and he began to feel better. From time to time, the puma pressed his muzzle (口鼻) against Daniel and rocked his head gently. Clearly, the puma knew that Daniel must not fall asleep. This animal should have been a real danger to Daniel and yet the boy began to feel safe.
They remained like that for several hours until Daniel and the puma heard voices. The rescue team had found them.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.

We are all busy（31） about and using the Internet, but how many of us know the history of the Internet?
Many people are（32） when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be（33） to be used by many different computers. If part of the network was not working, information could be sent through （34） part. In this way computer network system would  （35） on working all the time. （36） the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed （37） it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software（软件）（38） made "surfing" the Internet more convenient.
Today it is （39） to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular （40） students. The Internet has now become one of the most important parts of people's life.