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    科目： 来源：不详 题型：单选题

    If you have something important to do, you ___ waste any time.
    A．needn’tB．mustn’tC．may notD．won’t

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    科目： 来源：不详 题型：单选题

    You ___ me, but since you have,I’ll keep it secret from others.
    A．needn’t have toldB．didn't need to tellC．wouldn't have toldD．couldn't have told

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    科目： 来源：不详 题型：单选题

    If you want to borrow a football after school, your student card ___ here.
    A．has to leaveB．must leaveC．has to be leftD．must be left

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    科目： 来源：不详 题型：单选题

    As a graducate in computer science, he ___ to work out the problem.
    A．wouldn't have failedB．can't have failedC．mustn’t have failedD．might not have failed

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    科目： 来源：不详 题型：单选题

    You did not go to the party yesterday, or I ___ you.
    A．would seeB．could meetC．might have seenD．might see

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    科目： 来源：不详 题型：单选题

    —Did you arrive here this morning??
    —Yes,it was at nine o’clock ____we came here.
    A．whenB．before
    C．whichD．that?

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    科目： 来源：不详 题型：单选题

    You____be ashamed of yourselves.You’ve created this problem.?
    A．have toB．used to?
    C．needed toD．ought to?

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    科目： 来源：不详 题型：单选题

    — Mary,how did your maths test go??
    —I had thought I _____ ,but in fact I came in the top 10 in my class. ?
    A．should have failed
    B．couldn’t have failed?
    C．might have failed
    D．shouldn’t have failed?

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    科目： 来源：不详 题型：单选题

    We _____ last night,but we went to appreciate the flowerbeds and streetlights in Tian’anmen Square instead.?
    A．might studyB．could study?
    C．should have studiedD．must have studied?

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    科目： 来源：不详 题型：单选题

    --Don't be so disappointed.I’m sure that you can do better in the next exam.
    --Yes, but I ____ this time.
    A．should be more carefulB．could be more carefulC．should have been more careful
    D．must have been more carefully

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