—Must we take off our shoes before coming in? —No,——.

问题描述:

—Must we take off our shoes before coming in? —No,——.
A.you mustn't B.you don't have to C.you won't D.you must 为什么是D

正确答案是B
D答案是错误的.首先形式就是错误的,no 后面只用否定形式,不会跟肯定形式.
must 提问,如果用否定回答就使用you don't have to.