Must I clean the classroom now?No,you____.You can do it after school. A.mustn't B.can't C.don't

问题描述:

Must I clean the classroom now?No,you____.You can do it after school. A.mustn't B.can't C.don't
选什么,写出理由!急啊!

C. don't 这里是把后面的 have to 省略了.

you don't have to = you needn't