Question

Many factors influence a student in his/her study, ____ I think are out of a teacher’s control.  

A．most of them	B．most of which
C．most of what	D．most of that

Answer 1

B

这个句子尤其要注意区分A和B选项的不同，只要我们注意了标点符号就知道这并不是个并列句，所以不能选A。因为是逗号，说明后面是个非限制性定语从句，这里考查的是介词＋which的用法，原句可还原成…most of the factors …。