There is no light on dormitory. They must have gone to the lecture, ? A. didn’t they B. ——青夏教育精英家教网—

摘要： 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

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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