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

     

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    There is no light on dormitory. They must have gone to the lecture, ______?

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

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    There is no light on dormitory. They must have gone to the lecture, ______?

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

    查看答案和解析>>


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