求助高手解答~~~~!!!!!
---Mayweleavetheclassroomnow?---No,you___.You____toleaveuntilthebellrings.Amustn't,ar...
---May we leave the classroom now?
---No,you___.You____to leave until the bell rings.
A mustn't , are allowed
B don't , are supposed
C needn't , aren't allowed
D can't , aren't supposed 答案是A,为什么? 展开
---No,you___.You____to leave until the bell rings.
A mustn't , are allowed
B don't , are supposed
C needn't , aren't allowed
D can't , aren't supposed 答案是A,为什么? 展开
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询