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    科目： 来源： 题型：单选题

    He always enters the classroom ________ the back door instead of the front door.


    1. A.
      in
    2. B.
      into
    3. C.
      by
    4. D.
      across

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    科目： 来源： 题型：单选题

    Three of us will go. The rest ________ staying at home.


    1. A.
      is
    2. B.
      are
    3. C.
      was
    4. D.
      were

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    科目： 来源： 题型：单选题

    ________, the experiment will be successful.


    1. A.
      If carefully doing
    2. B.
      If it done carefully
    3. C.
      If carefully done
    4. D.
      If doing carefully

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    科目： 来源： 题型：单选题

    ________ human beings depend to a great extent on forests, every effort must be made to preserve trees and wildlife.


    1. A.
      If
    2. B.
      Unless
    3. C.
      Until
    4. D.
      Since

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    科目： 来源： 题型：单选题

    We were greatly encouraged by the news of China _______ another man-made satellite.


    1. A.
      to have launched
    2. B.
      to launch
    3. C.
      launched
    4. D.
      having launched

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    科目： 来源： 题型：单选题

    It is reported that a province has ________ to form a new state．


    1. A.
      broken down
    2. B.
      broken up
    3. C.
      broken away
    4. D.
      broken out

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    科目： 来源： 题型：单选题

    A terrible earthquake ________ out last night in this area and everything was in ruins．


    1. A.
      put
    2. B.
      brought
    3. C.
      broke
    4. D.
      took

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    科目： 来源： 题型：单选题

    I have some ________ the English grammar．


    1. A.
      difficulties in understanding
    2. B.
      difficulties to understand
    3. C.
      difficulty understanding
    4. D.
      difficulty to understand

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    科目： 来源： 题型：单选题

    The ABC company, ________ you visited a manager yesterday, was built in 1988．


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

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    科目： 来源： 题型：单选题

    You will never ________ all your homework tonight if you don’t fix your attention on it．


    1. A.
      get on with
    2. B.
      get back
    3. C.
      get in
    4. D.
      get through

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