问题

Can we leave the classroom now– No, you ______. You ______ to leave until the bellrings.
A:mustn’t, are allowed
B:don’t have to, are supposed
C:needn’t, aren’t allowed
D:can’t, aren’t supposed
B:don’t have to, are supposed
C:needn’t, aren’t allowed
D:can’t, aren’t supposed
正确答案是: