she is no longer ( ) she was ten years ago.a what b that选哪个,为什么?

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she is no longer ( ) she was ten years ago.a what b that选哪个,为什么?

she is no longer ( ) she was ten years ago.a what b that选哪个,为什么?
she is no longer ( ) she was ten years ago.
a what b that
选哪个,为什么?

she is no longer ( ) she was ten years ago.a what b that选哪个,为什么?
本题所缺部分为表语,而 that不能起到表语的作用,只有what既做了主句的表语,又可做从句的成分,可以省略关系代词,所以应选A.
不明白再看看这个网友的回答.
希望能帮到你.
http://zhidao.baidu.com/question/18401853.html

A
what 做was 的表语