【题目】 I have many friends, some re teachers.
A. of them B. from which C. who of D. of whom
在线课程【答案】D
【解析】
试题分析：考查定语从句。句意：我有很多朋友他们有的是老师。A. of them 介词of加代词；B. from which 介词from引导；C. who of who引导；D. of whom of加whom。原句应该是some of them are taechers所以介词用of，句中不缺少主语，所以用whom，所以选D。