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    科目： 来源：不详 题型：单选题

    By the time Jack returned home from England, his son  _______  from college.
    A．graduatedB．has graduatedC．had been graduatingD．had graduated

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    科目： 来源：不详 题型：单选题

    Yangzhou high school ___________ since 1902. 
    A．has come into existenceB．has been existedC．has been in existenceD．began to exist

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    科目： 来源：不详 题型：单选题

    A new kind of drug ___ ___ to cure H7N9 bird flu by the scientists and they are hopeful that they will succeed in a couple of weeks.
    A．has been developedB．is being developedC．is developingD．has developed

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    科目： 来源：不详 题型：单选题

    By the time I see you again, I _______ from that school.
    A．have graduatedB．graduatedC．will have graduatedD．graduate

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    科目： 来源：不详 题型：单选题

    —Ann is in hospital.
    —Oh, really? I ________ know. I ________ go and visit her.
    A．didn't; am going toB．didn't; willC．don't; willD．don't; would

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    科目： 来源：不详 题型：单选题

    ----Are you a teacher?
    ----No, but I ______ in Harbin No. 3 High School for 3 years.
    A． had taughtB．has taught C．teachD．taught

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    科目： 来源：不详 题型：单选题

    I had been working on math for the whole afternoon and the numbers ________ before my eyes.
    A．swim B．swamC．swimming D．had swum

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    科目： 来源：不详 题型：单选题

    —I have a headache.
    —I’m not surprised you ________ in front of the computer for too long.
    A．workB．are workingC．have been workingD．had worked

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    科目： 来源：不详 题型：单选题

    —I didn’t expect that John would be absent from my last Sunday’s birthday party.
    —As far as I know, he ______ to see his parents in the countryside on Sundays.
    A．goesB．wentC．has goneD．had gone

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    科目： 来源：不详 题型：单选题

    —Do you remember when I first met you?
    —Of course. I __________ in a small food factory.
    A．worked B．was workingC．had been working D．work

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