问题 选择题

Not until all the fish died in the lake __________ how serious the pollution was.

A.did the villagers realize

B.the villagers realized

C.realized the villagers

D.do the villagers realize

答案

答案:A

题目分析:句意:直到湖里所有的鱼都死了,村民才意识到污染多严重。Not until+从句放在句首的时候,后面的主句要部分倒装,助动词放在主语前面,排除BC,因为前面用died,所以用一般过去式,选A。

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