--- Listen! David is talking happily with his mother in the next room. --- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
#77427
A
should
B
must
C
can’t
D
mustn’t
推荐题目
--______ we clean the classroom at once? --No, you _____. You____ clean it after school.
#76555
A
Must, needn’t, may
B
Must, mustn’t, can
C
Shall, can’t, must
D
Need, mustn’t, may
---Do you still remember when we went to Chong qing?----I can’t remember now but_____ sometime last summer?
#62767
A
could it be
B
might it be
C
must it have been
D
could it have been
—Can we run across the road now?—No, we _ . We have to wait until the light turns green.
#75388
A
needn't
B
mustn't
C
couldn't
D
shouldn't
—Li Lin took the 8:00 bus to Fuzhou this morning.—Really? He _________ a fast train. It’s much more comfortable to travel by fast train.
#63197
A
could have taken
B
should take
C
must have taken
D
can take