Mr Smith must have been to your home this morning.

问题描述:

Mr Smith must have been to your home this morning.
——Mr Smith must have been to your home this morning.
——No,he________ ,because he didn't know my address.
A.couldn't.B.can't.c.mustn't.D.may not

A.smith先生早晨一定去过你家里了.不可能,因为他不知道我的地址.B不能 C不应该 D 可能不