Not until all the fish died in the river, ___

试题详情及答案解析

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

试题分析：考查特殊句式。not until位于句首时，主句使用部分倒装，即把be/do/will/can/have等提到主语之前，B、C未倒装；not被提到了句首，排除D，故选A。
考点：考查特殊句式