-Was't it Dr Li who spoke to you just now?

问题描述:

-Was't it Dr Li who spoke to you just now?
-__________________.
A.I didn't know he was.
B.Yes,it was.
C.No,he wasn't
D.Yes,he did.

B
反意疑问句,如果回答是肯定的,用yes,反之用no,所以排除A.
问题是用wasn‘t来问的,所以排除D
问题中是问wasn’t it,所以回答时人称应一致,所以选B