After ten years she changed a lot and looked different from she used to be.A. thatB. who

问题补充：

After ten 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：what he/she/it used to be已经成为一种习惯说法,意为“过去的样子”。what指一种情况,并非指“人”,所以不能用who/whom。