Question

 Gun control is a subject     Americans have argued for a long time. 

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

 

Answer 1

【答案】

 C

【解析】考查定語從句，先行詞是Gun control，指物，關系詞在從句中做介詞的賓語，介詞前置，介詞與從句動詞構成搭配argue about sth，選C。