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    科目： 来源：不详 题型：单选题

    —Why? Where is the key to the meeting room? 
    —Dear me! You ______ it in the taxi!
    A．had never leftB．didn’t leaveC．never leftD．haven’t left

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    科目： 来源：不详 题型：单选题

    The latest data put forward by the states suggested that the business ___ improving.
    A．wasB．beC．beingD．should

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    科目： 来源：不详 题型：单选题

    ----How do you find our company?
    ----A little worried. We _________ ground as a leader in the field of IT with the others speeding up development.
    A．have lostB．are losingC．lostD．were losing

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    科目： 来源：不详 题型：单选题

    —Did you know more about the mine accident?
    —Oh, sorry, I had no idea. I ____the Rescue Center now.
    A．will be phoningB．am to phoneC．will phoneD．phone

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    科目： 来源：不详 题型：单选题

    ---Can I help you, sir? 
    ---Yes. I bought this radio here yesterday, but it _____.
    A．didn't workB．wouldn't workC．can't workD．doesn't work

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    科目： 来源：不详 题型：单选题

    —Do you regret not having gone abroad?
    —Why should I? I ____as much, but I’m glad to devote myself to our motherland.
    A．didn’t earnB．don’t earnC．hadn’t earnedD．haven’t earned

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    科目： 来源：不详 题型：单选题

    －What a dry day!
    －We _______ such dry weather for almost twenty days．
    A．haveB．have hadC．have been havingD．have been had

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    科目： 来源：不详 题型：单选题

    I_____ violin lessons every two weeks, but I think I ‘ll make it every week from next month.
    A．am havingB．have had
    C．haveD．have been having

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    科目： 来源：不详 题型：单选题

    Selecting a mobile phone for personal use is no easy task because technology __________ so rapidly.
    A．is changingB．has changedC．will have changedD．will change

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    科目： 来源：不详 题型：单选题

    All the preparations for the task ___________, and we’re ready to start.
    A．completedB．completeC．had been completedD．have been completed

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