A computer____think for itself; it must be told what to do.   

试卷相关题目

• 1Walking alone in the quiet town, Helen thought she _____ have invited John to enjoy the peace together.

  A.can't

  B.needn't

  C.should

  D.might

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• 2— What sort of car do you want to have?  An expensive one?   — Well,it _____ be expensive-that's not important.    

  A.mustn't

  B.needn't

  C.can't

  D.won't

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• 3— I come all the way to say 'Thank you' and we ____ it  without you.   — Think nothing of it.   

  A.should have done

  B.mustn't have done

  C.couldn't have done

  D.needn't have done

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• 4Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members.After all, it was Christmas!

  A.shouldn't

  B.mustn't

  C.can't

  D.needn't

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• 5The traffic is heavy this day, I ____ arrive a bit late, so  could you save me a place?     

  A.can

  B.must

  C.need

  D.might

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• 6You____ buy a  gift, but you can if you want to.    

  A.must

  B.mustn't

  C.have to

  D.don't have to

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• 7The man in the corner  ______ be Mr. White. He is attending a conference in the City Hall.

  A.mustn't

  B.may not

  C.needn't

  D.can't

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• 8—There is someone knocking at the door - who ______ it be? — I think it is John. He told me he would come.

  A.could

  B.shall

  C.must

  D.need

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• 9— Sorry, Professor Smith. I didn't finish the assignment yesterday.—  Oh, you______have done it as yesterday was the deadline.

  A.Should

  B.mustn't

  C.must

  D.shouldn't

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• 10--- Must I start the work at once?     --- No, you ______.     

  A.may not

  B.mustn't

  C.needn't

  D.can't

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