BOB hopes to become a friend of ____shares his bitterness and happiness.

问题描述:

BOB hopes to become a friend of ____shares his bitterness and happiness.
A.whoever B.whatever C.whomever D.whichever
请问这道题为什么选A?A和C的区别用法是?

A
意思是BOB希望和能与自己分享快乐和忧愁的人成为朋友.
Whom为宾格形式,此处根据语境应选who