A: May I go out to play football, Dad?B: No, you ________. You must finish your homework first. 
#74877
A
may not
B
needn’t
C
shouldn’t
D
mustn’t
推荐题目
 I felt surprised that anyone of his intelligence   ________  such an easy test.
#62347
A
might have failed
B
could have failed
C
should have failed
D
must have failed
Alice    be at school because she phoned me from her home a minute ago.
#76102
A
mustn’t
B
isn’t able to
C
may not
D
can’t