He is a man of great experience,___much can be learned.A.who B.from which C.which D.from whom知道是选D,但为什么选D,A,B,C为什么不行.

问题描述:

He is a man of great experience,___much can be learned.
A.who B.from which C.which D.from whom
知道是选D,但为什么选D,A,B,C为什么不行.