_______ pollution is the key to _______ the country a comfortable and clean place to live in.

试卷相关题目

• 1We tried ________all our own vegetables, but found it impossible to grow enough for the family．

  A.growing

  B.grown

  C.grow

  D.to grow

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• 2It is well known that the horse will run faster if _________．

  A.is whipped

  B.whipping

  C.it is

  D.whipped

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• 3The weather is ________ and the water in river has been ________．

  A.freezing; frozen

  B.frozen; freezing

  C.freezing; freezing

  D.frozen; frozen

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• 4You shouldn't risk ________ in the polluted river．

  A.to swim

  B.swimming

  C.swim

  D.swam

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• 5_______ more is necessary but it is not quite necessary _______ this book again.

  A.Reading; reading

  B.Reading; to read

  C.To read; to read

  D.To read; reading

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• 6Write your article ________ what you have experienced during the accident．

  A.is based on

  B.basing on

  C.which based on

  D.based on

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• 7His doctor advised him ________.

  A.stop smoking

  B.to stop smoking

  C.stopping to smoke

  D.stop to smoke

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• 8I'm considering ________ a new car．

  A.buying

  B.buy

  C.to buy

  D.of buying

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• 9No one is allowed ________ cell phone in class.

  A.using

  B.to use

  C.use

  D.used

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• 10Please excuse me if I have left any of your question ________．

  A.unanswer

  B.unanswering

  C.to unanswer

  D.unanswered

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