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    科目： 来源： 题型：单选题

    Air pollution is ________ kind of pollution.


    1. A.
      the seriousest
    2. B.
      seriously
    3. C.
      the most serious
    4. D.
      most seriously

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    科目： 来源： 题型：单选题

    When the land or the river was dirty in ________ place, man moved to ________ place.


    1. A.
      one, the other
    2. B.
      one, the others
    3. C.
      some, others
    4. D.
      one, another

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    科目： 来源： 题型：单选题

    It's possible for us to ________ pollution.


    1. A.
      get on
    2. B.
      get out of
    3. C.
      get off
    4. D.
      get into

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    科目： 来源： 题型：单选题

    A large number of people ________ hard to keep our country clean.


    1. A.
      are working
    2. B.
      were working
    3. C.
      has worked
    4. D.
      is working

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    科目： 来源： 题型：单选题

    He studies hard ________ catch up with others.


    1. A.
      as so to
    2. B.
      to as so
    3. C.
      so to as
    4. D.
      so as to

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    科目： 来源： 题型：单选题

    Did the big factory ________ dirty smoke into the air?


    1. A.
      let out of
    2. B.
      let into
    3. C.
      let out
    4. D.
      let off

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    科目： 来源： 题型：单选题

    ________ people take part in the sports.


    1. A.
      Many and many
    2. B.
      More and more
    3. C.
      Much and much
    4. D.
      Less and less

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    科目： 来源： 题型：单选题

    Have you visited the bridge ________ the workers have just finished building ________?


    1. A.
      /…/
    2. B.
      where…it
    3. C.
      where…/
    4. D.
      /…it

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    科目： 来源： 题型：单选题

    The man ________ has gone to Beijing．


    1. A.
      whom I told you
    2. B.
      which I told you
    3. C.
      whom I told you about him
    4. D.
      I told you about

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    科目： 来源： 题型：单选题

    Is it in this house ________ he was born?


    1. A.
      which
    2. B.
      where
    3. C.
      that
    4. D.
      in which

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