He is no longer the simple-minded man__he was five years ago.A.that B.which C.whom D.what

问题描述:

He is no longer the simple-minded man__he was five years ago.A.that B.which C.whom D.what
选that 为什么不能选whom呢?

如果帮你改一下,或许你就明白了
He is no longer the (same) simple-minded man as the one (that) he was five years ago.
他不再是五年前同一个头脑简单的那个人了.
或者改成
He's no longer the same simple-minded man as he was five year ago.
the same...as