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    科目： 来源：不详 题型：单选题

    If there       no buying and selling of animals, there      no killing in nature.  
    A. is; will be              B. will be; will be        C. is; is

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    科目： 来源：不详 题型：单选题

    –Were you at school when he came to see you?
    –Yes, I ______ a math class.
    A. was having               B. had                  C. am having

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    科目： 来源：不详 题型：单选题

    — Is Paul playing both soccer and tennis for the school?
    — He ______. But now he has given up playing tennis.
    A．isB．hasC．wasD．had

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    科目： 来源：不详 题型：单选题

    — Put these glasses away before they______.
    — OK, I’ll put them in the cupboard.
    A．have brokenB．are breakingC．get brokenD．will be broken

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    科目： 来源：不详 题型：单选题

    — Are you a member of the club?
    —       . It’s years since I       .
    A．Yes; wasB．No; wasC．Yes; had beenD．No; became

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    科目： 来源：不详 题型：单选题

    The stars who advertise some false medicine _____ for the deaths caused by the medicine.
    A．are to blameB．are going to blameC．are to be blamedD．should blame

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    科目： 来源：不详 题型：单选题

    Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
    A．workB．workingC．is workingD．are working

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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．workB．are workingC．workedD．have been working

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    科目： 来源：不详 题型：单选题

    My parents have promised to come to see me before I _________ for Africa.
    A．have leftB．leaveC．leftD．will leave

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    科目： 来源：不详 题型：单选题

    What he has achieved still _________ all the people around．
    A．astonishesB．astonishedC．astonishingD．astonishment

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