She thought I was talking about her daughter in fact I was talking about my daughter.A

问题补充：

She thought I was talking about her daughter, , in fact, I was talking about my daughter.

A. whom

B. where

C. which

D. while

答案：

A. whom

B. where

C. which

(答案→)D. while

解析：while 连词，有而，却，表示对比。