Not until all the fish died in the river      how specious the pollution was.
A．did the villagers realizeB．that the villagers realized
C．the villagers did realizeD．didn’t the villagers realize
A
考查倒裝結(jié)構(gòu)。Not until否定放在句首，主句的主謂要用倒裝結(jié)構(gòu)，故選A。
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