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    科目： 来源：不详 题型：单选题

    Do you know that a living cell can be       for a thousand years if the temperature is right?
    A．sparedB．protectedC．preservedD．developed.

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    科目： 来源：不详 题型：单选题

    He is amazingly cheerful considering all that he has      .
    A．looked throughB．gone through
    C．broken throughD．seen through

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    科目： 来源：不详 题型：单选题

    Though having lived abroad for years，many Chinese still________the traditional customs.
    A．perform　　　B．possessC．observe　　　D．support

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    科目： 来源：不详 题型：单选题

    The teacher always waits until all the children ______ before he starts the lesson.
    A．get downB．set downC．put downD．settle down

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    科目： 来源：不详 题型：单选题

    Children who ______ well will be given a red flower and an apple as encouragement.
    A．behaveB．proveC．showD．look

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    科目： 来源：不详 题型：单选题

    While looking for a book, I ______ this old photo taken in college.
    A．came intoB．came acrossC．came upD．came out

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    科目： 来源：不详 题型：单选题

    Although we have only met ______, I find we have a lot in common.
    A．from time to timeB．in time
    C．by chanceD．over and over again

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    科目： 来源：不详 题型：单选题

    I have always regretted ______ harder at school.
    A．not to study B．to not study
    C．having not studiedD．not having studied

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    科目： 来源：不详 题型：单选题

    We have ______ the get-together until next weekend when we won’t be so busy.
    A．set offB．put off C．take offD．set up

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