摘要：38．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
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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
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
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