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. New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.

A. is used; not to pollute       B. has used; is not polluted

C. is being used; do not pollute     D. has been used; to pollute

C


解析:

本題主要考查動詞的時態及語態的應用。第 1 空強調目前所正在進行的一種行為。由于主語是動作的承受者,應該使用現在進行時的被動語態;第 2 空強調一般經常性的行為,應該用一般現在時。因此本題的正確答案選C。

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(1)

According to the passage all the following are right EXCEPT that ________.

[  ]

A.

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B.

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C.

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A.

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A.

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C.

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A.

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D.

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A.

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