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    【题目】It puzzles the scientists _____ some mammals produce their young _____ others lay eggs．

    A．that; while B．what; while

    C．that; as D．what; as

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    【题目】With the quality-oriented education (素质教育) being carried out, teachers won’t ___ too much importance to students’ grades.

    A.involve B.attach C.display D.stress

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    【题目】Professor Smith will come here to give a speech．All the preparations must be _____ before 5 o’clock．

    A．in time B．in sight C．in place D．in control

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    【题目】People were puzzled _______ they read the book.

    A. the first time B. at the first time

    C. for the first time D. at first

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    【题目】--- I can’t go for a picnic with you because something urgent has _____．

    ---What a shame!

    A．come up B．cleared up C．stayed up D．ended up

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    【题目】A strange girl entered the room and told me a story of her own, _____ I suspected the truth．

    A．that B．which C．of which D．at which

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    【题目】Our class _______ forty-five students, in other words, forty-five students ______ our class.

    A. consists of, are made up of.

    B. is consisted of, make up.

    C. consists of, make up.

    D. is consisted of, are made up of.

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    【题目】If our marketing plan succeeds, we _______ the sales by thirty percent next year.
    A.would increase
    B.will increase
    C.would have increased
    D.will be increasing

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    【题目】______ we guess, the man wearing dark-glasses is a detective for this murder case.
    A.As long as
    B.As well as
    C.As far as
    D.As soon as

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    【题目】— Did you have a good time last night?
    — Yes, I did. It was a long time since I _____ myself.
    A.haven't enjoyed
    B.didn't enjoy
    C.enjoy
    D.had enjoyed

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