We _______ talk loudly when we see the sign “ Be quiet ”on the right. 
#78159
A
must
B
mustn’t
C
need
D
needn’t
推荐题目
Mary _______ be in the hospital. I saw her play basketball a minute ago.
#62940
A
mustn’t
B
shouldn’t
C
can’t
D
may not
You ______to meeting this afternoon if you have something important to do.
#76109
A
needn’t to come
B
don’t need come
C
don’t need comimg
D
needn’t come
You _________ get up so early. It’s weekend today.
#75626
A
mustn’t
B
can’t
C
needn’t
D
oughtn’t