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    科目： 来源：不详 题型：单选题

    Rainforests ____ and burned at such a speed that they will disappear from the earth in the near future.
    A．cutB．are cutC．are being cutD．had been cut

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    科目： 来源：不详 题型：单选题

    — Why do you look so worried?
    —My computer broke down and my essay ______ unfinished since.
    A．had leftB．has been left
    C．has leftD．was left

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    科目： 来源：不详 题型：单选题

    –Tom, what’s the matter with you? You look so worn out!
    --Nothing serious. I ____ my new house all the day and I am afraid I won’t finish until tomorrow afternoon.
    A．have whitewashed B．am whitewashing
    C．have been whitewashingD．shall be whitewashing

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    科目： 来源：不详 题型：单选题

    –With the final examination approaching, I’m getting anxious. As a consequence, I have no appetite for anything and even can’t fall asleep.
    -- Don’t worry. Things will pick up if you ____ yourself.
    A．trustB．rescue C．sacrificeD．relax

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    科目： 来源：不详 题型：单选题

    It is the fourth time that she  ________you in a week.
    A．ringsB．has rungC．has been ringingD．is ringing

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    科目： 来源：不详 题型：单选题

    —Time ________. It’s likely that we’ll miss the deadline.
    —Don’t worry. We have already got through 80% of the job.
    A．is running outB．has run outC．is being running outD．has been run out

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    科目： 来源：不详 题型：单选题

    John promised his doctor he ________not smoke，and he has never smoked ever since.
    A．might　　　B．shouldC．couldD．would

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    科目： 来源：不详 题型：单选题

    — Remember the first time we met, Jim?
    — Of course I do. You _______ in the library.
    A．have readB．had readC．were readingD．read

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    科目： 来源：不详 题型：单选题

    --- Have you finished the report?
    --- No. I ______ it all this week.
    A．will do B．had doneC．have been doingD．have done

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    科目： 来源：不详 题型：单选题

    He could speak English fluently because he __________ it for four years when he was a college student.    
    A．had studiedB．have been studyingC．studiedD．was studying

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