19、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
19、B
科目：高中英語 來源： 題型：
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
科目：高中英語 來源： 題型：
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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