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    They had to before they finished the course because they were not well disciplined. A.drop in B.drop out C.drop off D.drop by 【查看更多】

     

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    They had to_________ before they finished the course because they were not well disciplined.

    A.drop in                           B.drop out

    C.drop off                      D.drop by

     

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    They had to_________ before they finished the course because they were not well disciplined.

    A.drop in                           B.drop out

    C.drop off                      D.drop by

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    They had to_________ before they finished the course because they were not well disciplined.

    A．drop inB．drop out
    C．drop offD．drop by

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    He had to___ before they finished the course because they were not well disciplined.

    A.drop in              B.drop out   C.drop off              D.drop by

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    He had to___ before they finished the course because they were not well disciplined.


    1. A.
      drop in
    2. B.
      drop out
    3. C.
      drop off
    4. D.
      drop by

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