i think that the effect a teacher has on children is actually greater than___of their parents.

问题描述:

i think that the effect a teacher has on children is actually greater than___of their parents.
A.it B.one C.that D.which

C
可以用排除法
因为前句是children,所以要用复数指代,AB肯定不对
然后是人,所以which不对,只有C