Here is the man __ you've been looking for.可用whom Is there anything __ I can do for you.

问题描述:

Here is the man __ you've been looking for.可用whom Is there anything __ I can do for you.
为什么不用what 而用that

whom (可省)
that
what 不可以作关系词引导定语从句.这里是修饰先行词anything 的