Gun control is a subject_____Americans have argued for a long time.

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问题 Gun control is a subject_____Americans have argued for a long time.

选项 A、of which
B、with which
C、about which
D、into which

答案C

解析考查定语从句，先行词是subject，指物，先行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。

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中学英语

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