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    科目： 来源：不详 题型：单选题


    .  Three hours ______ enough for us to finish the task.
    A．areB．hasC．isD．Were

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    科目： 来源：不详 题型：单选题


    . Many a student ______ the importance of learning a foreign language.
    A．have realizedB．has realizeC．have been realizedD．has been realized

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    科目： 来源：不详 题型：单选题


    .  The gas works ______ near the city.
    A．isB．areC．wereD．Be

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    科目： 来源：不详 题型：单选题


    .  The surroundings of his house ______ clean now.
    A．isB．areC．wasD．Were

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    科目： 来源：不详 题型：单选题


    . The public ______ generous in their contributions to the earthquake victims.
    A．isB．wasC．areD．has been

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    科目： 来源：不详 题型：单选题


    . Cattle ______ on the hillside.
    A．grazesB．is grazingC．was grazingD．were grazing

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    科目： 来源：不详 题型：单选题


    . Her politics ______ neither conservative nor liberal.
    A．isB．areC．wasD．has been

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    科目： 来源：不详 题型：单选题


    . Measles ______ a kind of infectious illness.
    A．isB．areC．wereD．have been

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    科目： 来源：不详 题型：单选题


    . Tom is the only one of the stall members who ______ to be promoted.
    A．is goingB．are goingC．has been goingD．have been going

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    科目： 来源：不详 题型：单选题


    . What caused the accident ______ on the road.
    A．were stoneB．were stonesC．was stoneD．was stones

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