单选题
Not until all the fish died in the river ______ how serious the pollution was.
A) the villagers realized C) did the villagers realize
B) the villagers did realize D) didn't the villagers realize
A、
Not until all the fish died in the river ______ how serious the pollution was.
B、
the villagers realized
C、
the villagers did realize
D、
did the villagers realize
E、
didn't the villagers realize
【正确答案】
C
【答案解析】
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