This is the problem _______ you should pay attention.A.to which B.on whichC.at whichD.which为什么选A?在这句中to起什么作用?

问题描述:

This is the problem _______ you should pay attention.
A.to which
B.on which
C.at which
D.which
为什么选A?在这句中to起什么作用?

A
这个介词to是短语pay attenrion to(注意)中的

这里考得的是从句和pay attention to 的用法 句子中pay attention缺乏一个to ,所以把TO提到从句句首,而加介词的疑问词只有WHICH