问题
选择题
All the students are seated in the classroom, actually good at their study, listening attentively.
A．most of whom
B．most of who
C．most of them
D．most of which
答案
答案：C
考察句子知识.句意:所有学生都坐在教室里，他们中的大部分实际上很擅长学习，正在聚精会神的听讲。下文为主句的一个分句，省略谓语动词are。选项ACD引导从句，故选C，指代前文all the students，做分句主语。