______ environmental damage is done, it takes many years for the ecosystem to recover.

试卷相关题目

• 1In the forest we observed some trees ______ the leaves were black with disease.

  A.where

  B.of which

  C.in which

  D.whose

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• 2The man who was being followed stopped from time to time ______ he wanted to tie his shoelaces.

  A.as if

  B.like

  C.what

  D.as

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• 3It was quite a serious mistake, ______ caused by carelessness.

  A.which I think was

  B.I think which was

  C.which I think it was

  D.I think which it was

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• 4— ____ in this street?   — I think Mr. Black is the richest man.

  A.Whom do you think is the richest man

  B.Who do you think is the richest man

  C.Do you think who is the richest man

  D.Do you think whom is the richest man

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• 5I don't believe the reason ____ he has given for not coming to the lecture.

  A.why

  B.that

  C.how

  D.what

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• 6The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, ______ meant spending tens of thousands of pounds.

  A.who

  B.that

  C.as

  D.which

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• 7Children's brains can't develop properly_______ they lack protein(蛋白质).

  A.when

  B.since

  C.because

  D.unless

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• 8In our university there are several big parks ______ we students can go to enjoy the beautiful scenery．

  A.to which

  B.at which

  C.from which

  D.in which

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• 9I haven't found my watch yet; in fact, I'm not sure ______ I could have done with it.

  A.where

  B.whether

  C.what

  D.how

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• 10This is certainly the case, but ____ it is a mistake or not I don't know.

  A.if

  B.even though

  C.whether

  D.that

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