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    科目： 来源：不详 题型：单选题

    John knocked at the door for nearly five minutes____his wife opened it.
    A．whenB．before 　　C．until 　　D．as

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    科目： 来源：不详 题型：单选题

    Sally worked late in the evening to finish her report _____ her boss could read it first thing next morning.
    A．because 　　B．so that 　　C．before 　　D．or else

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    科目： 来源：不详 题型：单选题

    The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this.
    A．thereforeB．and 　　　　C．then 　　　　D．but

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    科目： 来源：不详 题型：单选题

    ______ they live in the same house, we would no trouble finding them.
    ---But as traveling salesmen as well as seasonal herdsmen and farmhands, as you know, they move house _______ many of the Americans who live on wheels.
    A．As far as; as often asB．As well as; as well as
    C．As long as;;as often as 　　　D．As long as ; as far as

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    科目： 来源：不详 题型：单选题

    _____ he thought he was helping us with the work , he was actually in the way.
    A．Because 　　　B．If 　　　　　　C．Although 　　　D．When

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    科目： 来源：不详 题型：单选题

    The question came up at the meeting _____ we had not enough money to do the research.
    A．whetherB．if 　　　　　C．that 　　　　D．what

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    科目： 来源：不详 题型：单选题

    It still puzzles today’s scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代)
    A．that; whileB．why; whileC．how; whenD．what; as

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    科目： 来源：不详 题型：单选题

    _______ you have masses of work to do, you don’t have to help me with the housework. 
    A．So thatB．Now thatC．If thatD．in that

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    科目： 来源：不详 题型：单选题

    .I don’t like the way ______ he talks; he is so rude.
    A．thatB．whichC．whereD．in that

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    科目： 来源：不详 题型：单选题

    There are many other ways to advertise _______ broadcast advertisements on radio and TV.
    A．exceptB．as wellC．besideD．besides

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