You ________ stop when the traffic light turns red. 
#76630
A
can
B
had better
C
need
D
must
推荐题目
—How much shall I pay for the telephone call? —You  _____. It's free.
#76026
A
mustn't
B
shouldn't
C
don't have to
D
can't
We _______ work very quickly.
#76098
A
don’t need
B
needn’t to
C
need not to
D
don’t need to