Many species can communicate an amazin...

填空题Many species can communicate an amazing amount of information via sound, information which both the life of an individual and the continued existence of the species may depend.
A. amazing B. via C. which D. continued

参考答案：C 应改为on which。

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2.填空题There is a delicate balance of nature which many square miles of ocean and vegetation and clean air are needed to maintain a relatively few human beings.
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3.填空题The law I am referring requires that everyone who owns a car have accident insurance.
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A. have won B. a C. on D. enemy

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5.填空题I regret having left the work unfinished ;I should plan everything ahead carefully.
A. having left B. unfinished C. should plan D. ahead

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6.单项选择题Although I had been invited to the opening ceremony, I was unable to attend ______ such short notice.

A．to
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7.单项选择题This is an existing area of study, and one ______ which new applications are being discovered almost daily.

A．from
B．by
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8.单项选择题I"ve kept up a friendship with a girl whom I was at school ______ twenty years ago.

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9.单项选择题Although we feel dissatisfied with the election results, we have to become reconciled ______ the decision made by our fellow countrymen.

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10.单项选择题Observations were made ______ the children at the beginning and at the end of pre-school and first grade.

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