Gun control is a topic ____________ Americans have discussed for a long time.A．o_刷题宝

题干

Gun control is a topic ____________ Americans have discussed for a long time.

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

上一题下一题 0.64难度单项选择更新时间:2016-08-17 12:32:11

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