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。