— Who’s singing in the next room? — It ______ be Mary. She ______ New York. 
#75016
A
mustn’t, is in
B
must, has gone to
C
could, has been in
D
can’t, has gone to
推荐题目
You ______ do it if you really don’t want to.
#76709
A
can’t
B
couldn’t
C
needn’t
D
mustn’t
This pair of shoes ______ Li Gang’s ,It’s too big for him .
#76071
A
can’t be
B
could be
C
might be
D
must be
You ________ stop when the traffic light turns red. 
#76630
A
can
B
had better
C
need
D
must