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
答案: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 …。