It is high time that we ____ the amount of carbon dioxide in our daily life

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• 1It's too bad that I failed in the math exam. If only I ______ hard at it!

  A.worked

  B.had worked

  C.has worked

  D.would work

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• 2He made a suggestion _____ the meeting _____ be put off until next Tuesday

  A.that; /

  B.if; should

  C.when; must

  D.whether; can

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• 3--- Shall I go and buy two more bottles of beer? --- No, I've already bought twenty. That _____ be enough for us two

  A.can

  B.may

  C.ought to

  D.might

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• 4______ it rain heavily tomorrow, we would have to put off the visit to the Forbidden City.

  A.Were

  B.Should

  C.Would

  D.Will

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• 5— I find it astonishing that John ______ be so rude to me. — Not astonishing at all. He is always rude to others.

  A.should

  B.must

  C.might

  D.would

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• 6---Artistic people______be very difficult sometimes． ---Well，you should know you married one．

  A.can

  B.might

  C.could

  D.must

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• 7There used to be a church in the past , ______ ?

  A.isn't there

  B.didn't there

  C.usen't it

  D.used not it

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• 8The weather turned out to be fine yesterday. I ________ the trouble to carry my umbrell

  A.A.needn't take

  B.couldn't take

  C.needn't have taken

  D.couldn't have taken

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• 9My parents insisted that I _____ medicine instead of law.

  A.must study

  B.will study

  C.had better

  D.study

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• 10--- I sent him the dictionary by mail this morning . --- You ____ that; he's coming tomorrow afternoon

  A.needn't have done

  B.didn't have to

  C.needn't do

  D.mustn't do

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