It was not until the teacher had explained it three times how to work out the problem. A. did he understand B. had he understood C. that he understood D. that he didn’t understood 题目和参考答案——青夏教育精英家教网—

题目内容

It was not until the teacher had explained it three times _______ how to work out the problem.

A. did he understand B. had he understood

C. that he understood D. that he didn’t understood

【答案】

【解析】

试题分析：考查固定句型。句义：直到老师解释了三次我才明白了怎样做这个题，首先给我关键词：It was …+that …,构成强调句型，根据倒装句：not until 位于句首构成：主到从不倒；用语强调句型不倒装，所以C正确。

考点：考查固定句型

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