---Be polite . You _____ talk to the old like that !  ---Sorry , I won’t .
#75286
A
needn’t
B
wouldn’t
C
mustn’t
D
couldn’t
推荐题目
 — Can we leave the classroom now?— No, you ______. You ______ to leave until the bell rings.
#74363
A
mustn’t, are allowed
B
don’t have to, are allowed
C
needn’t, aren’t allowed
D
can’t, aren’t allowed