问题
选择题
Gun control is a subject ________Americans have argued for a long time,
A．of which
B．with which
C．into which
D．about which
答案
答案：D
题目分析：考查定语从句：介词+which引导的定语从句修饰subject，从句中argue是不及物动词，argue about sth“争论某事”选D。
点评：定语从句的介词要根据先行词的搭配，或者从句中的动词，名词的搭配来选择。