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    科目： 来源：不详 题型：单选题

    When I approached to the subway entrance, an explosion occurred. This ___my first experience, I got into panic
    A．wasB．isC．beingD．been

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    科目： 来源：不详 题型：单选题

    .Nobody knew when the fire ________, but they knew it ________ the next morning.
    A．broke out; was put outB．was broken out; was put out
    C．broke out; put outD．was broken out ; wwent out

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    科目： 来源：不详 题型：单选题

    With a travelling speed of up to 350 kilometres per hour, the railway to be built between Beijing and Shanghai _______ the journey time from 12 hours to 5 hours．
    A．cutsB．will cutC．is cuttingD．has cut

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    科目： 来源：不详 题型：单选题

    The project _______ a success as the income of the company increases every year. 
    A．is provedB．had provedC．has provedD．has been proved

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    科目： 来源：不详 题型：单选题

    The UK, which _______ Great Britain and Northern Ireland, is a country famous for its history. 
    A．consisted ofB．consisting ofC．consists of D．is consisted of

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    科目： 来源：不详 题型：单选题

    ---Would you have helped her had it been possible? 
    ---Yes, but I __________ busy with my work.
    A．wasB．had beenC．have beenD．am

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    科目： 来源：不详 题型：单选题

    The thief was brought in, his hands ____________ behind his back.
    A．had been tiedB．tiedC．being tiedD．having tied

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    科目： 来源：不详 题型：单选题

    It is well known to us all that a lot of rivers _______by factories.
    A．are pollutingB．have been polluting
    C．are being pollutingD．are being polluted

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    科目： 来源：不详 题型：单选题

    — Mom, where is my lunch pack?
    — Just where it _____.
    A．has beenB．had beenC．wasD．be

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    科目： 来源：不详 题型：单选题

    The whole class________ the teacher attentively.
    A．are listening toB．is listening to
    C．are listeningD．is listening

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