I met one of my students the other day. After several years she changed a lot and looked

问题补充：

I met one of my students the other day. After several years, she changed a lot and looked different from she used to be.

A. that

B. whom

C. what

D. who

答案：

A. that

B. whom

(答案→)C. what

D. who

解析：本题考查名称性从句。从句she used to be缺少表语，用what作表语。句意：多年之后她变化好大，看起来和过去的那个大不相同了。