I don’t know the teacher is talking with Miss WangA. whatB. whomC. whichD. who

问题补充：

I don’t know the teacher is talking with Miss Wang．

A. what

B. whom

C. which

D. who

答案：

A. what

B. whom

C. which

(答案→)D. who

解析：考查定语从句。the teacher是先行词，指人，在定从 is talking with Miss Wang．中作主语，所以选D。