--_____ you call back tomorrow? --Of course I can. 
#74920
A
Can
B
Must
C
May
D
Need.
推荐题目
 ---Why hasn’t Jane arrived yet?  ---She ______ again in the morning.
#62660
A
shouldn’t have overslept
B
may have turned off the alarm clock
C
must have no one to call her
D
should have someone to wake her up
Lisa is going to clean her _______ room when she _________ back from school next weekend. 
#77126
A
living; is coming
B
living; comes
C
live; come
D
lives; is going to come