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    Half of the class most of the work . some of the work really difficult . a. have done, is b. has done, are c. has done, is d. have done, are 【查看更多】

     

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    Half of the class       most of the work. Some of the work       really difficult.

    A.have done; is      B.has done; are      C.has done; is D.have done; are

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     Half of the class__________ most of the work. Some of the work ________really difficult.

    A. have done ; is                     B. has done ;are

    C. has done ; is                      D. have done ; are

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    Half of the class ________ most of the work．Some of the work ________ really difficult．

    [　　]

    A．have done, is

    B．has done, are

    C．has done, is

    D．have done, are

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