题目

题型：不详难度：来源：

(2009·陕西)Gun control is a subject ________ Americans have argued for a long time.

A．of which	B．with which
C．about which	D．into which

答案

C

解析

先行词为subject，将先行词还原到定语从句中：Americans have argued about the subject for a long time。由此可以看出被还原部分为about the subject，这样可以确定所选的介词为about。