Not until all the fish died in the lake __________ how serious the pollution was

题干

Not until all the fish died in the lake __________ how serious the pollution was.

A．did the villagers realize	B．the villagers realized
C．realized the villagers	D．do the villagers realize

上一题下一题 0.64难度单项选择更新时间:2014-07-23 06:11:10

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