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    科目： 来源：不详 题型：单选题

    It took him a long time to ______ the skills he needed to become an artist.
    A．acquireB．arriveC．return D．cover

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    科目： 来源：不详 题型：单选题

    The number of the people who own cars ______since 1990.
    A．is increasedB．are increased
    C．have been increasingD．has been increasing

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    科目： 来源：不详 题型：单选题

    They would __if food was difficult to find, so they celebrated when they had food.
    A．killB．disappearC．starveD．start

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    科目： 来源：不详 题型：单选题

    With the help of high technology, more and more new substances ___in the past few years.
    A．discovered B．have discovered
    C．had been discoveredD．have been discovered

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    科目： 来源：不详 题型：单选题

    –Why, Jack, you look so tired!
    --Well, I ___the house and I must finish the work tomorrow.
    A．was painting B．will be painting
    C．have paintedD．have been painting

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    科目： 来源：不详 题型：单选题

    The mother didn't know who      the glass because it happened when she was out.
    A．breakB．has brokenC．had brokenD．breaks

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    科目： 来源：不详 题型：单选题

    Betty and Arthur ____ on separate holidays in a few days’ time.
    A．goB．goingC．are goingD．went

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    科目： 来源：不详 题型：单选题

    They became friends again that day. Until then, they _____ to each other for nearly two years.
    A．won't speakB．haven't spoken
    C．hadn't spokenD．haven't been speaking

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    科目： 来源：不详 题型：单选题

    —Did you notice my little son just now?
    —No, Mrs Black. I ______ computer games.
    A．playB．am playingC．would playD．was playing

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    科目： 来源：不详 题型：单选题

    一Did he notice you enter the classroom?
    一I don’t think so．He _______ to the radio with his eyes shut·
    A．1istenedB．was listening
    C．has listenedD．had listened

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