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    Once , everyone taking the examination will be given test papers. A. seated B. seating C. being seated D. having seated 【查看更多】

     

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    Once        ,everyone taking the examination will be given test papers.

    A.seated                       B.seating                      C.being seated               D.having seated

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    Once_____, everyone taking the examination will be given test papers.

    [     ]

    A. seated
    B. seating
    C. being seated
    D. having seated

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