this is a revision paper .When you do it,you'd better make a mark ____ you have question

问题描述:

this is a revision paper .When you do it,you'd better make a mark ____ you have question
A.where
B.the place
C.as if
D.since

A 这里的where 是关系副词,你们应该学过,关系副词通常就相当于一个介词加上关系代词的意思.所以这里的where可以理解为on which.用on 是因为mark on.
那么这句的意思就是“在你有问题的地方做记号”
这句话是一个地点状语从句