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    科目： 来源：不详 题型：单选题

    If nothing ________, the oceans will turn into fish deserts.
    A．doesB．had been doneC．will doD．is done

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    科目： 来源：不详 题型：单选题

    — Have you heard about the recent election?
    — Sure, it ________ the only thing on the news for the last three days.
    A．would beB．isC．has beenD．will be

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    科目： 来源：不详 题型：单选题

    — I don’t understand why you didn’t go to the lecture yesterday afternoon.
    —I’m so sorry. But I _________ my homework.
    A．had doneB．was doingC．would doD．am doing

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    科目： 来源：不详 题型：单选题

    On Monday morning it usually ________ me an hour drive to work although the actual distance is only 20 miles.
    A．takes B．is taking C．took D．will take

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    科目： 来源：不详 题型：单选题

    Jim ______ a late night film at home when, right in the middle a thrilling scene, the television went blank.
    A．watched B．had watched C．was watching D．would be watching

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    科目： 来源：不详 题型：单选题

    The famous musician, as well as his students, ____ to perform at the opening ceremony of the 2012 Taipei Flower Expo.
    A．were invitedB．was invitedC．have been invitedD．has been invited

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    科目： 来源：不详 题型：单选题

    The girl has a great interest in sport and ____ badminton classes twice a week over the last three years.
    A．tookB．is takingC．takesD．has been taking

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    科目： 来源：不详 题型：单选题

    He was unhappy when he sold his guitar.After all,he _____it for a long time.
    A．has hadB．had hadC．hasD．had

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    科目： 来源：不详 题型：单选题

    We are confident that the environmenr       by our further efforts to reduce pollution
    A．had been improvedB．will be imrovedC．is improvedD．was improved

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    科目： 来源：不详 题型：单选题

    Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
    A．had leftB．would leaveC．was leavingD．has left

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