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    科目： 来源：不详 题型：单选题

    Seldom ____ any mistakes during my past few years of working here.
    A．would I makeB．did I makeC．I did makeD．shall I make

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    科目： 来源：不详 题型：单选题

    Only after Mary read her article a second time _____the spelling mistakes.
    A．did she noticeB．she noticed
    C．does she noticeD．she has noticed

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    科目： 来源：不详 题型：单选题

    He failed the mid-term examination and only then________how much time he had wasted.
    A．he realizedB．did he realize
    C．he had realizedD．had he realized

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    科目： 来源：不详 题型：单选题

    Not once ________ to Michael that he could one day become a top student in his class.
    A．occurred itB．did it occur
    C．it occurredD．it did occur

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    科目： 来源：不详 题型：单选题

    ________ a mobile phone can you ring ______ you want to talk with anyway.
    A．Using; whoeverB．Only on; whomever
    C．By; whateverD．With; anyone

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    科目： 来源：不详 题型：单选题

    Only when _____ be possible to sign the contract.
    A．the lawyer comes it will
    B．does the manager come will it
    C．has the manager come it will
    D．the manager comes will it

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    科目： 来源：不详 题型：单选题

    ______ the teacher has given permission, ______allowed to use the equipment in the lab.
    A．Only if, are the studentsB．If only, the students are
    C．If only, are the studentsD．Only if the students are

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    科目： 来源：不详 题型：单选题

    Though _____ money, his parents managed to send him to university.
    A．lackingB．lackC．lacked inD．lacking of

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    科目： 来源：不详 题型：单选题

    Down __________ and hurt his leg.
    A．fell the boyB．fell he
    C．did he fallD．did the boy fell

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    科目： 来源：不详 题型：单选题

    The new machine, if 　　　 properly, will work for at least ten years.
    A．used B．useC．using D．being used

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