After 15 years, she changed a lot and looked quite different from she used to be.
A. that
B. whom
C. what
D. who
网友回答
A. that
B. whom
(答案→)C. what
D. who
解析：主要测试宾语从句。由语境可知译文为：十五年后，她的变化非常大，看起来和过去完全不同。句子 she used to be中需要动词be的表语，同时介词from也需要宾语，又是一道测试双重作用的试题，只能选择what引导词了。