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    科目： 来源：专项题 题型：单选题

    — Can I get out in the daytime?
    — No. The school rules state that no child ____ be allowed out during the day, unless accompanied by an adult.
    [     ]
    A. shall
    B. need
    C. will
    D. can

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    科目： 来源：专项题 题型：单选题

    — The terrible accident is under investigation.
    — Actually, quicker action ____ those workers trapped in the mine.
    [     ]
    A. might have saved
    B. must have saved
    C. ought to have saved
    D. should have saved

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    科目： 来源：同步题 题型：单选题

    — Lucy doesn't mind lending you her dictionary.
    — She _____. I've already borrowed one.
    [     ]
    A. can't
    B. mustn't
    C. needn't
    D. shouldn't

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    科目： 来源：浙江省模拟题 题型：单选题

    —These grapes look really beautiful.
    —They ______ ! See the price, $ 3.99 a pound. Too expensive, aren't they?
    [     ]
    A. would          
    B. could          
    C. might        
    D. should

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    科目： 来源：模拟题 题型：单选题

    Sandy looks very happy. She _____ have got the well-paid job.

    [     ]

    A. should
    B. could
    C. must
    D. might

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    科目： 来源：模拟题 题型：单选题

    The weather turned out to be fine yesterday. I _____ the trouble to carry my umbrella with me.

    [     ]

    A. should have taken
    B. could have taken
    C. needn't have taken
    D. couldn't have taken

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    科目： 来源：山东省模拟题 题型：单选题

    Since everybody will make a mistake, we        at whoever makes mistakes.
    [     ]
    A. ought to have laughed
    B. oughtn't to laugh
    C. ought to laugh    
    D. should not to laugh

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    科目： 来源：北京模拟题 题型：单选题

    — You must be looking forward to your trip back to Sydney.
    — Yes. I ______ wait any longer.
    [     ]
    A. can't
    B. mustn't
    C. needn't
    D. shouldn't

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    科目： 来源：专项题 题型：单选题

    For the engine to work, the green button ____ be in the "on" position.
    [     ]
    A. can
    B. would
    C. must
    D. might

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    科目： 来源：专项题 题型：单选题

    If the dog hadn't woken us, we wouldn't have noticed the fire and it ____ to the house next door.
    [     ]
    A. could spread
    B. should have spread
    C. would spread
    D. might have spread

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