--_____ you call back tomorrow? --Of course I can. 
#74920
A
Can
B
Must
C
May
D
Need.
推荐题目
Tom, you ________ leave all your clothes on the floor like this next time. 
#63404
A
mustn’t
B
wouldn’t
C
needn’t
D
may not
Some teenagers would rather _____ than _______ in their spare time. 
#75991
A
play computer games, doing exercise
B
to play computer games, to do exercise
C
play computer games, do exercise
D
playing computer games, do exercise
She __________ be here. I saw her come in.
#77390
A
can
B
may
C
should
D
must