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    科目： 来源：不详 题型：单选题

    You can get the best result ______you carry out the experiment under the desired conditions.
    A．what ifB．even ifC．only ifD．as if

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    科目： 来源：不详 题型：单选题

    If you want to live a happy life, you’d better learn to accept life _____it is..
    A．asB．thatC．whichD．where

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    科目： 来源：不详 题型：单选题

    A British official said that_____ this impractical policy could be changed , the future for Britain was indeed dark.
    A．unlessB．whenC．ifD．until

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    科目： 来源：不详 题型：单选题

    Usually pilots need about a decade of experience _______ they can be promoted to captain.
    A．afterB．beforeC．thenD．when

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    科目： 来源：不详 题型：单选题

    _______ children get older, they become more and more interested in everything.
    A．OnceB．WhetherC．WithD．As

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    科目： 来源：不详 题型：单选题

    You had better book rooms at the hotel in advance       you should find no room on your arrival.
    A．so thatB．even ifC．in caseD．now that

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    科目： 来源：不详 题型：单选题

    ______ you talk or write a message to someone, you show your language skills to others.
    A．Every timeB．Some timeC．At timesD．The time

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    科目： 来源：不详 题型：单选题

    _______ he was 12, Einstein had learned advanced mathematics by himself.
    A．As soon asB．At the timeC．By the timeD．During the time

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    科目： 来源：不详 题型：单选题

    Please tell me ______ you are getting on with your new classmates.
    A．whetherB．howC．whatD．where

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    科目： 来源：不详 题型：单选题

    The entire hall burst into a great cheer and applause _______ the Nobel Prize winner appeared on the stage accompanied by the chairman.
    A．untilB．whileC．by the timeD．the moment

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