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    科目： 来源：不详 题型：单选题

    Why is so silent in the room? He _________asleep in the room.
    A．should beB．must beC．must have beenD．should have been

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    科目： 来源：不详 题型：单选题

    —You ought to have made an apology to Tom yesterday evening．
    —Yes, I know I __       __．
    A．ought to haveB．have toC．shouldD．must have

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    科目： 来源：不详 题型：单选题

    "They didn’t take measures in time, otherwise the explosions ____．"some experts said．
    A．wouldn’t happenB．didn’t happen
    C．wouldn’t have happenedD．mustn’t have happened

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    科目： 来源：不详 题型：单选题

    It was playing computer games that cost the boy plenty of time that he ______ spent doing his lessons.
    A．might haveB．should
    C．ought to haveD．could

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    科目： 来源：不详 题型：单选题

    If you were to do it,the result______different.
    A．will beB．would beC．should beD．would have been

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    科目： 来源：不详 题型：单选题

    I really don’t know how to express my thanks to Mr. Li, my high school English teacher, without whose help I__________ to college that year.
    A．weren’t to goB．hadn’t been able to go
    C．couldn’t goD．couldn’t have gone

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    科目： 来源：不详 题型：单选题

    It is often recommended that children ________chances to get close to nature.
    A．are offeredB．be offeredC．should offerD．must be offered

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    科目： 来源：不详 题型：单选题

    ———It was a green dinner. _______ 
    ———Thanks. But it really only took an hour.
    A．You must be tired.B．I enjoyed it very much.
    C．You must have spent all day cooking.D．I have never had it before.

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    科目： 来源：不详 题型：单选题

    The boy         the first prize, but he was so careless as to make a foolish mistake.
    A．must have gainedB．need have gained
    C．could have gainedD．shall have gained

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    科目： 来源：不详 题型：单选题

    He did not regret saying what he did but felt that he _________ it differently.
    A．could expressB．would express
    C．could have expressedD．must have expressed

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