I saw a lot of children playing on the ground, most of whom ____boys. A. are B. were C. being D. be 答案是C。 补充:但是我选的是B,我的理由是:逗号后面是一个限制性定语从句。 如果把whom换成them 答案毫无疑问是C;being,因为此时逗号后面是独立主格结构。 那么在逗号后是用了whom 的情况下为什么能用being 呢??? 如果能解释这道题, 请发邮件到:colory16@163.com