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    There is no light in the dormitory. They must have gone to the lecture, ? A. didn't they B. don't they C. mustn't they D. haven't they 【查看更多】

     

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    There is no light in the dormitory .They must have gone to the lecture,_____?（2004 上海春，31）

    A.didn’t they    B.don’t they

    C.mustn’t they     D.haven’t they

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    There is no light in the dormitory. They must have gone to the lecture, ________? (NMET 2004)

    [　　]

    A．didn't they
    B．don't they
    C．mustn't they
    D．haven't they

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