—Morn, must I clean my room now?—No, you     . You can do it in the afternoon.
#75763
A
mustn't
B
needn't
C
can't
D
don't
推荐题目
I have trouble ________ the new words. 
#75119
A
memorize
B
to memorize
C
memorizing
D
memorized
.Just be patient. You ________expect the world to change so soon.
#63611
A
can’t
B
needn’t
C
may not
D
will not