Someone is knocking at the door. It     my sister. It's time for her to be back.
#75649
A
can’t be
B
may not be
C
must be
D
mustn’t be
推荐题目
-Thank you for your gift. -________________
#77112
A
The same to you.
B
You’re welcome.
C
Thank you.
D
Good idea.
Boys, you ______ be sitting in this room. It is for your teachers only.
#76759
A
shouldn’t
B
don’t have to
C
won’t
D
needn’t