问题补充：
---- Wasn’t it Dr. Wang 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
答案：
A. I didn’t know he was
(答案→)B. Yes, it was
C. No, he wasn’t
D. Yes, he did
解析：疑问句是一个强调句，it在句子中作主语，所以回答这样的问题也要用Yes，it was或No，it wasn’t。
