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    科目： 来源：不详 题型：单选题

    The doctors are doing all that they _____, but the old man is still not breathing properly.
    A．shallB．needC．mayD．can

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    科目： 来源：不详 题型：单选题

    —May I smoke here?    —If you _____, choose a seat in the smoking section.
    A．shouldB．couldC．mayD．must

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    科目： 来源：不详 题型：单选题

    I was really anxious about you. You____ home without a word.
    A．mustn’t leaveB．shouldn’t have leftC．couldn’t have leftD．needn’t leave

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    科目： 来源：不详 题型：单选题

    A giant of a man was standing in the doorway. His face was almost completely hidden by a long and untidy hair and a wild beard, but you ______ make out his eyes, shining like black beetles under all the hair.
    A．mightB．couldC．shouldD．would

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    科目： 来源：不详 题型：单选题

    David, you _____play with the valuable bottle; you_______ break it.
    A．won’t; can’t B．mustn’t; may
    C．shouldn’t; must D．can’t; shouldn’t

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    科目： 来源：不详 题型：单选题

    ---- May I smoke here?
    --- If you      , choose a seat in the smoking section.
    A．shouldB．couldC．mustD．may

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    科目： 来源：不详 题型：单选题

    –When can I get the result of the test, sir?
    –You ____ have it next Friday.
    A．couldB．shallC．mustD．may

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    科目： 来源：不详 题型：单选题

    —How is the debate of your essay?
    —It ____ well, but I ____one of the key points.
    A．might work; hadn’t forgotB．needn’t have worked; forgot
    C．could have worked; forgotD．would work; hadn’t forgot

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    科目： 来源：不详 题型：单选题

    Whale beachings（搁浅）_______ be caused by factors such as illness, or disorientation（迷失方向）caused by extra noise in the oceans, ______ shipping or oil and gas drilling.
    A．might; fromB．will; byC．should; inD．shall; on

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    科目： 来源：不详 题型：单选题

    If you _____ leave early on weekdays, do it quietly. The other classmates are also dying to have an early leave.
    A．canB．mustC．shouldD．may

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