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更新 2022-09-03
科目英语
题型单选题
难度较易
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Many a professor _____ looking forward to visiting Germany now. Many scientists _____ studied animals and plants in the last two years.

A．is; have

B．is; has

C．are; have

D．is; are

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In order to keep the balance of ecosystem, every possible means _______to deal with the problems of the over-exploiting of natural resources.

A．has tried

B．has been tried

C．have taken

D．have been taken

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We all thought that Betty could have run _______ if she had worn the sports-shoes that day.

A．even faster

B．more slower

C．much quickly

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In that traffic accident last night the man who hit five people in a row had drunk so much that he could no longer_______ between fantasy and reality.

A．distinguish

B．disguise

C．disturb

D．disgust

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Mr. Andrew taught his students how to develop the basic skills in the physics class, ______ everything through jokes and experiments.

A．to explain

B．explained

C．explaining

D．explains

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Mr. Bryan is a/an _______ secretary in our office, for he is able to do tasks successfully, without wasting time or energy.

A．effective

B．efficient

C．flexible

D．sufficient

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