【题目】 Not until all the fish died in the river, ____ how serious the pollution was.
A. did the villagers realizeB. the villagers realized
C. the villagers did realizeD. didn’t the villagers realize
在线课程【答案】A
【解析】
考查倒装。句意：直到河里的鱼都死了，村民才意识到污染有多么严重。not until位于句首时，采用部分倒装，即：助动词+（主句）主语+谓语，故A项正确。