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    科目： 来源： 题型：单选题

    Not easy as the problem of pollution is______, no one should just stop trying.


    1. A.
      to solve
    2. B.
      to be solve
    3. C.
      solving
    4. D.
      being solved

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    科目： 来源： 题型：单选题

    ________the survivors in the traffic accident appreciated the police before they left for their homes


    1. A.
      The most of
    2. B.
      Most
    3. C.
      The majority of
    4. D.
      The majority

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    科目： 来源： 题型：单选题

    In competition, only women perform on the high-and-low bars, ________ is higher than the other.


    1. A.
      one of them
    2. B.
      one of which
    3. C.
      the one
    4. D.
      one of the two

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    科目： 来源： 题型：单选题

    No one but Jane ________ the secret．Nobody but Mary and I ________ in the classroom at that time．


    1. A.
      know；was
    2. B.
      knows；was
    3. C.
      know；were
    4. D.
      knows；were

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    科目： 来源： 题型：单选题

    John ________ a restless man. He kept moving from country to country.


    1. A.
      must be
    2. B.
      should be
    3. C.
      must have been
    4. D.
      should have been

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    科目： 来源： 题型：单选题

    When you go abroad, do you ________ take your passport with you?


    1. A.
      need
    2. B.
      must
    3. C.
      ought
    4. D.
      have to

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    科目： 来源： 题型：单选题

    The line was busy; someone ________ the telephone.


    1. A.
      must use
    2. B.
      must be using
    3. C.
      must have been using
    4. D.
      should have been using

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    科目： 来源： 题型：单选题

    Must I hand in the exercise now? No, you ________.


    1. A.
      mustn't
    2. B.
      can't
    3. C.
      needn't
    4. D.
      shouldn't

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    科目： 来源： 题型：单选题

    I left my bicycle here and now it's gone. Someone ________ it.


    1. A.
      must borrow
    2. B.
      may borrow
    3. C.
      must have borrowed
    4. D.
      should have borrowed

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    科目： 来源： 题型：单选题

    You ________ the roses. Look, it's raining now.


    1. A.
      mustn't have watered
    2. B.
      needn't have watered
    3. C.
      could have watered
    4. D.
      might have watered

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