It was an unpleasant subject ____ we _____ for a long time.A．about which…discuss

题干

It was an unpleasant subject ____ we _____ for a long time.

A．about which…discussed	B．about which…argued
C．over them…argued	D．which…argued

上一题下一题 0.64难度单项选择更新时间:2013-06-09 09:24:54

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