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             often do some           work at weekends .

    A. Voluntary …volunteers                 B. Volunteers …voluntary

    C. Volunteers …volunteered               D. Volunteers … volunteering

     

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            often do some           work at weekends .
    A．Voluntary …volunteersB．Volunteers …voluntary
    C．Volunteers …volunteeredD．Volunteers … volunteering

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            often do some           work at weekends .


    1. A.
      Voluntary …volunteers
    2. B.
      Volunteers …voluntary
    3. C.
      Volunteers …volunteered
    4. D.
      Volunteers … volunteering

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    Often students are        busy with schoolwork        care about people around them．

    A．so…as to        B．too…to              C．so…that                  D．such…that

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            often do some           work at weekends .
    A．Voluntary …volunteersB．Volunteers …voluntary
    C．Volunteers …volunteeredD．Volunteers … volunteering

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