Gun control is a subject Americans have argued for a long time.A. of which??? B.
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Gun control is a subject ______ Americans have argued for a long time.
A. of which??? B. with which???? C. about which????? D. into which
试题答案
【答案】
C
【解析】
考查定语从句，先行词是Gun control，指物，关系词在从句中做介词的宾语，介词前置，介词与从句动词构成搭配argue about sth，选C。