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    科目： 来源：不详 题型：单选题

    Some pre-school children go to a day care center,____ they learn simple games and songs.
    A．thenB．thereC．whileD．where

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    科目： 来源：不详 题型：单选题

    The book was written in 1946, ____ the education system has witnessed great charges.
    A．whenB．during whichC．since thenD．since when

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    科目： 来源：不详 题型：单选题

    ______ environmental damage is done, it takes many years for the ecosystem to recover.
    A．Even ifB．If onlyC．WhileD．Once

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    科目： 来源：不详 题型：单选题

    Choosing the right dictionary depends on_______you want to use it for.
    A．whatB．whyC．howD．whether

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    科目： 来源：不详 题型：单选题

    ____ that I’m feeling all right, my brain is also beginning to work much better.
    A．ForB．NowC．SinceD．Despite

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    科目： 来源：不详 题型：单选题

    Living things are dying out quickly. Let’s ask ____ destroying them in the past years.
    A．what part people have been playing
    B．people have played in
    C．what part people have played in
    D．people have been playing what part

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    科目： 来源：不详 题型：单选题

    ____ has finished the task ahead of time will be rewarded, though we don’t know who it will be.
    A．Those whoB．AnyoneC．WhoeverD．Who

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    科目： 来源：不详 题型：单选题

    He expressed his hope ____ he would visit China again the next year, and this was the very hope ____ he expressed as soon as he arrived in the country.
    A．that; thatB．which; whichC．that; whichD．which; that

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    科目： 来源：不详 题型：单选题

    I often think of the years ____ I worked with the foreigners, ____ has had a great effect on my later life.
    A．that; whichB．when; whichC．which; thatD．when; who

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    科目： 来源：不详 题型：单选题

    In the forest we observed some trees ____the leaves were black with disease.
    A．whereB．of whichC．in whichD．whose

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