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精英家教網 > 高中英語 > 題目詳情

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

C

解析試題分析：考查固定句型。句義：直到老師解釋了三次我才明白了怎樣做這個題，首先給我關鍵詞：It  was …+that …,構成強調句型，根據倒裝句：not until 位于句首構成：主到從不倒；用語強調句型不倒裝，所以C正確。
考點：考查固定句型

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