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    科目： 来源： 题型：单选题

    A large amount of research _________ to understand sleep.


    1. A.
      has done
    2. B.
      have done
    3. C.
      has been done
    4. D.
      have keen done

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    科目： 来源： 题型：单选题

    The man ________ was a brave emperor was Genghis Khan.


    1. A.
      whom
    2. B.
      who
    3. C.
      which
    4. D.
      whose

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    科目： 来源： 题型：单选题

    Our teacher doesn't let the boy __________ TV too much.


    1. A.
      to watch
    2. B.
      watch
    3. C.
      watching
    4. D.
      watches

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    科目： 来源： 题型：单选题

    They were students when they were in their ________.


    1. A.
      twenty
    2. B.
      twentith
    3. C.
      twenties
    4. D.
      twentieth

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    科目： 来源： 题型：单选题

    The policeman allowed us __________ the road when the lights are red.


    1. A.
      cross
    2. B.
      crossed
    3. C.
      crossing
    4. D.
      to cross

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    科目： 来源： 题型：单选题

    It is wise not to pretend to know ________ you don't know.


    1. A.
      that
    2. B.
      what
    3. C.
      who
    4. D.
      whom

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    科目： 来源： 题型：单选题

    The TV set ________ in Japan is Kangkang's.


    1. A.
      made
    2. B.
      making
    3. C.
      who
    4. D.
      whom

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    科目： 来源： 题型：单选题

    Winter ________ from November to January.


    1. A.
      comes
    2. B.
      has
    3. C.
      takes
    4. D.
      lasts

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    科目： 来源： 题型：单选题

    选出下列单词中划线部分读音不同于其他三个的选项


    1. A.
      days
    2. B.
      ways
    3. C.
      plays
    4. D.
      says

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    科目： 来源： 题型：单选题

    选出下列单词中划线部分读音不同于其他三个的选项


    1. A.
      snow
    2. B.
      blow
    3. C.
      throw
    4. D.
      brown

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