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    科目： 来源：不详 题型：单选题

    It is necessary _____ something to protect our environment.
    A．doB．to doC．doesD．doing

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    科目： 来源：不详 题型：单选题

    It is very hot today. What about _____ swimming?
    A．goB．goesC．goingD．went

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    科目： 来源：不详 题型：单选题


    Daming likes _____ in the morning everyday.
    A．runB．runsC．runingD．running

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    科目： 来源：不详 题型：单选题


    Students are supposed ________ hard at school.
    A．studyingB．studiedC．to studyD．study

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    科目： 来源：不详 题型：单选题


    Although we’ve learned English for years, we have trouble _____ the       foreigners.
    A．understandB．to understandC．understandingD．of understanding

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    科目： 来源：不详 题型：单选题


    We couldn’t wait _______ a good rest after the exam.
    A．haveB．to haveC．makingD．to make

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    科目： 来源：不详 题型：单选题


    What can we students do _____ the environment?
    A．to protectB．protectedC．protectingD．protects

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    科目： 来源：不详 题型：单选题


    Teachers’ job is ______ the students learn well.
    A．helpingB．helpC．to helpD．helped

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    科目： 来源：不详 题型：单选题


    When you read English,          translate every word into Chinese.
    A．try not to B．try to C．don’t try D．not try

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    科目： 来源：不详 题型：单选题


    I find it very hard           the question.
    A．to answerB．answersC．answeringD．answered

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