David I have been sharing a dorm for more than two years is quite a funny guy.A. of who

问题补充：

David, I have been sharing a dorm for more than two years, is quite a funny guy.

A. of whom

B. with whom

C. in whom

D. from whom

答案：

A. of whom

B. with whom

C. in whom

D. from whom

解析：句意：和我住在一个宿舍两年多的David是很有趣的家伙。这里使用了定语从句，先行词是David，定语从句中使用share sth with sb，缺少介词with，可以放在关系代词whom前面，所以选B。