解放军文职考试：“代词most, some, many, few, neither等+of+关系代词which/whom”引导的非限制性定语从句

　　这种结构常用来引导非限制性定语从句，有时候也可把“of+关系代词which/whom”置于代词前。

　　【考例】I have many friends,______some arebusinessmen. (2005全国卷Ⅰ)

　　A. of them　　　B. from which　C. who of　　D. of whom

　　据题意，后部分是对前句中的名词many friends起补充说明的作用，故选D。of whom引导非限制性定语从句，相当于一个并列分句and some of them are businessmen。