Not until the media repotred the pollution___why there were so many dead fish floating in the river

题目

Not until the media repotred the pollution___why there were so many dead fish floating in the river
A had the villagers understood
B the villagers had understood
C the villagers understood
D did the villagers understand
选哪个为什么?

答案

Not until ...did/will...直到.才.选D .did the villagers understand当Not until位于句首时,句子要倒装.其结构为:Not until+从句/表时间的词+助动词+(主句)如:①Not until the teacher came in did the students st...