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    科目： 来源： 题型：单选题

    You look ________ today．What's wrong?


    1. A.
      worry
    2. B.
      worries
    3. C.
      worring
    4. D.
      worried

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    科目： 来源： 题型：单选题

    Please _________ the lights when you leave the room, or it will waste much electricity.


    1. A.
      turn off
    2. B.
      put off
    3. C.
      turn on
    4. D.
      turn down

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    科目： 来源： 题型：单选题

    _______ is it wasteful to throw away glass and paper?


    1. A.
      What
    2. B.
      How
    3. C.
      Why
    4. D.
      How long

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    科目： 来源： 题型：单选题

    We should stop the factory from __________ the river.


    1. A.
      pollutes
    2. B.
      polluting
    3. C.
      polluted
    4. D.
      to pollute

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    科目： 来源： 题型：单选题

    She ________ in the library at this time of day．


    1. A.
      is study
    2. B.
      studies
    3. C.
      is studying
    4. D.
      does studying

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    科目： 来源： 题型：单选题

    Who are _______ over there?


    1. A.
      they
    2. B.
      them
    3. C.
      their
    4. D.
      there

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    科目： 来源： 题型：单选题

    Our teacher thinks ________ their students ________ their friends.


    1. A.
      over，for
    2. B.
      of，as
    3. C.
      out，in
    4. D.
      about...up

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    科目： 来源： 题型：单选题

    The sun gives us light ________ the day.


    1. A.
      during
    2. B.
      on
    3. C.
      for
    4. D.
      since

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    科目： 来源： 题型：单选题

    I prefer ____ to ____.


    1. A.
      sing; dance
    2. B.
      singing; dancing
    3. C.
      singing; dance
    4. D.
      sing; dancing

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    科目： 来源： 题型：单选题

    ________ they had a lot of work to do， ________ they often helped these old men.


    1. A.
      Though，but
    2. B.
      Though，still
    3. C.
      Though，/
    4. D.
      Although，but

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