You know he is not going to let us leave early if we ___ get the work done.A.can't B.may not C.shouldn't D.mustn't为什么不选B
问题描述：
You know he is not going to let us leave early if we ___ get the work done.
A.can't B.may not C.shouldn't D.mustn't
为什么不选B
答
C
答
A
答
A 不能（B不可能,C不应该,D不可以,表示‘禁止’,这三项与题意不符）