---Must I come at four o'clock?--No you ---.A .may not B.don't have to

问题描述:

---Must I come at four o'clock?--No you ---.A .may not B.don't have to

B
don't have to
没有必要

B 不必
A 也许不(注意:一定不能翻译成”可以不”)
所以选B