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    科目： 来源：不详 题型：单选题


    This old computer must have been of great use to _______ did the scientific research.
    A．thoseB．whenC．whoeverD．whomever

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    科目： 来源：不详 题型：单选题


    --- I rang you at about ten, but there was no reply.
    --- Oh, that was probably ____ I was seeing the doctor.
    A．whenB．whyC．whatD．that

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    科目： 来源：不详 题型：单选题


    Maria has to baby-sit. That’s______ she can't come with us.
    A．whyB．hoC．whenD．what

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    科目： 来源：不详 题型：单选题


    ____ surprised me most was ______ they had finished it so quickly.
    A．What, whatB．That, thatC．What, thatD．That, what

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    科目： 来源：不详 题型：单选题


    The reason why she couldn’t come to the meeting was_____ she had not been invited.
    A．becauseB．whichC．thatD．why

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    科目： 来源：不详 题型：单选题


    Put yourself in situations where you're forced to communicate in English, ______ you'll see more progress over time．
    A．until B．orC．butD．and

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    科目： 来源：不详 题型：单选题


    27．It was the President himself______ opened the door．
    A．who B．whenC．whichD．where

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    科目： 来源：不详 题型：单选题


    The Mekong River Commission has found no evidence ______ the dams on the upper reaches have an influence on the water flow downstream．
    A．whichB．thatC．whereD．what

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    科目： 来源：不详 题型：单选题


    _________ the whole process for the studies of cancer took more than a year, the technology is moving so fast that it will soon take just weeks．
    A．HowB．BecauseC．IfD．While

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    科目： 来源：不详 题型：单选题


    Beijing took steps to limit the kinds of high-risk of borrowing money from the banks that can create the high price of housing, ______ happened in the United States．
    a．as                 B．that               C．how      D．while

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