There is no light in the room. They must
问题:
There is no light in the room. They must have gone to the lecture.__________?
A.didn’t they
B.haven’t they
C.don’t they
D.mustn’t they
There is no light in the room. They must have gone to the lecture.__________?
A.didn’t they
B.haven’t they
C.don’t they
D.mustn’t they