--- 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
(2013·高考重庆卷)—What are you doing this Saturday?—I’m not sure，but I________go to the Rolling Stones concert.
#62471
A
must
B
would
C
should
D
might
We can eat in the dining hall. But we _______ eat in the classroom.
#75733
A
don’t
B
didn’t
C
can’t
D
aren’t
You _________to the meeting yesterday. What was the reason for your absence?
#63309
A
had come
B
came
C
would have come
D
should have come
According to the traffic rules, you _________ wear the safe belt while you are driving.
#62676
A
can
B
need
C
may
D
shall