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(我选了C,为啥不行呢?)Not until all the fish died in the river,---------how serious the pollution was.A did the people realizeB the people realizeC the people did realizeD didn"t the people realize

题目详情
(我选了C,为啥不行呢?)
Not until all the fish died in the river,---------how serious the pollution was.
A did the people realize
B the people realize
C the people did realize
D didn't the people realize
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答案和解析
首先理解一下这句话,意思是:
直到河水中鱼死完了,人们才能意识到污染有多严重.
这里是固定句型,not nutil在前面的话,后一句中do动词需要提前,所以应该选A.