—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
Some frightening pets _________ be kept home so that they won’t hurt others.
#75599
A
can
B
may
C
must
D
need
---There is somebody knocking at the door. Who________ it be?---I’m not sure. It ________ be a postman.
#75825
A
may; must
B
will; can
C
can; may
D
may; will
John, you play with the knife, or you hurt yourself.
#76292
A
won’t; can’t
B
mustn’t; may
C
shouldn’t; must
D
can’t; shouldn’t
--Listen! Marry is singing in the next room. -- It __ ___ be Marry. She has gone home.
#74912
A
mustn’t
B
may
C
can’t
D
should
Unluckily, we missed the train. we early.
#62750
A
must have set out
B
had set out
C
should have set out
D
set out