题目内容
Not until all the fish died in the river ________ how serious the pollution was．
[ ]
A．did the villagers realize
B．the villagers realized
C．the villagers did realize
D．didn't the villagers realize
答案：A
解析：
解析：
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本题考查not until放在句首，主句中的谓语动词要倒装。 |
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