题目内容

【题目】It was not until all the fish in the pond died that________ the situation was serious.

A. did he realize B. he realized

C. he had realized D. had he realized

【答案】B

【解析】

试题分析:考查强调句。句意:直到池塘里所有的鱼都死了,他才意识到问题的严重性。强调句结构it is that,that后接完整句子,故选B项。

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