The horses ought ________ hours ago by raisers.

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• 1---- Daddy ,can you buy me a new MP3 when you go to Beijing? ---- You ____ get one if you are admitted to a key middle school

  A.could

  B.shall

  C.may

  D.can

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• 2Since it is already midnight, we ________.

  A.had better leaving

  B.ought to have leave

  C.should take our leave

  D.might as well leave

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• 3Our holidays were ruined by the weather; ______ have stayed at home．

  A.it may be as well

  B.it was just as well we

  C.we might just as well

  D.we might do as well as we

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• 4I am surprised that he ________ to help me when I needed it most.

  A.should refuse

  B.would have refused

  C.should have refused to

  D.may have refused

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• 5Black holes ________ not be seen directly，so determining the number of them is a tough task．

  A.can

  B.will write

  C.must

  D.need

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