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    科目： 来源：不详 题型：单选题

    —Li Ming went abroad in 2000.
    —No wonder. I ______ him ever since.
    A．don’t seeB．hadn’t seenC．didn’t seeD．haven’t seen

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    科目： 来源：不详 题型：单选题

    —The windows are dirty.
    —I know. They _________ for weeks.
    A．haven’t cleanedB．didn’t clean
    C．weren’t cleanedD．haven’t been cleaned

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    科目： 来源：不详 题型：单选题

    Luckily good things _________ here to save local wildlife.
    A．are doingB．are being done
    C．had been doneD．will do

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    科目： 来源：不详 题型：单选题

    ---I have got a headache．
    ----No wonder ．You _______in front of that computer too long ．
    A．work B．are working C．have been working D．worked

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    科目： 来源：不详 题型：单选题

    I know a little bit about the city as I __________ there for one year in my youth.
    A．am studyingB．had studiedC．studiedD．have studied

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    科目： 来源：不详 题型：单选题

    Catherine came home happily, which suggested that she        the final exam.
    A．had passedB．passC．would passD．should pass?

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    科目： 来源：不详 题型：单选题

    – May I go to the movies tonight, mum?
    -- You can when you ____ your homework.
    A．will finishB．are finishingC．will have finishedD．have finished

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    科目： 来源：不详 题型：单选题

    Ever since the financial crisis ________, many workers _______from their jobs.
    A．broke out; were laid off
    B．has broken out; were laid off
    C．had broken out; had been laid off
    D．broke out; have been laid off

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    科目： 来源：不详 题型：单选题

    ---The window must have taken you quite a lot of time that day.
    --- You are right. They ________ for weeks.
    A．haven’t been cleanedB．hadn’t been cleaned
    C．didn’t’ cleanD．haven’t cleaned

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    科目： 来源：不详 题型：单选题

    The leaders of the company are having a meeting to discuss where the new office building __.
    A．should situateB．should be situatedC．should be liedD．was located

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