—Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.
#74311
A
can’t
B
may not
C
mustn’t
D
needn’t
推荐题目
We went to the beach last Sunday, and we had great fun _____ volleyball.
#77512
A
play
B
playing
C
played
D
to play
.Susan’s parents have bought a large house with a swimming pool. It ______be very expensive.
#78190
A
can
B
must
C
mustn’t
D
can’t
— May I smoke here?— No, you ______ . This is a no-smoking room.
#75754
A
needn’t
B
mustn’t
C
couldn’t
D
wouldn’t
As to the question of whether we will sell our house or who we shall sell the house to, you ____ have answer by tomorrow.
#63004
A
shall
B
will
C
could
D
must