The biggest problem for most plants,which_______just get up and run away when threatened,is that animals like to eat them.

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• 1Madonna ________ a straight A student,but it was dancing that she was really crazy about.    

  A.must be

  B.could be

  C.must have been

  D.could have been

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• 2'You _______ be so tired that you had to stop to rest．' 

  A.should

  B.can't

  C.must

  D.mustn't

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• 3In the near future the computers ______ everywhere.

  A.can use

  B.can be used

  C.will use

  D.are used

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• 4We ________ last night, but we went to the concert instead.

  A.must have studied

  B.might study

  C.should have studied

  D.would study

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• 5You____________ this morning if you really wanted to see it yourself.

  A.ought to come

  B.might have come

  C.ought to have come

  D.can have come

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• 6Peter ______ be really difficult at times even though he's a nice person in general.

  A.shall

  B.should

  C.can

  D.must

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• 7One ought _______ for what one hasn't done.

  A.not to be punished

  B.to not be punished

  C.to not punished

  D.not be punished

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• 8Had your father seen the doctor earlier, he ____.

  A.would have died

  B.would not have died

  C.would not die

  D.has not died

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• 9----She must have gone back to the valley. ----No, she _____. The entrance to it was nowhere to be found.

  A.mustn't

  B.needn't

  C.couldn't

  D.hadn't

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• 10What a pity. Considering his ability and experience, he ____ better.

  A.need have done

  B.must have done

  C.can have done

  D.might have done

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