He failed the mid-term examination and only then________how much time he had was
题型：不详难度：来源：
He failed the mid-term examination and only then________how much time he had wasted.| A．he realized | B．did he realize | | C．he had realized | D．had he realized |
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答案
B |
解析
试题分析：句意：他期中考试不及格，只有到了那时，他才意识到他浪费了多少时间。
Only+副词/介词短语/状语从句等，后面的句子主体部分用倒装结构，即助动词+主语+动词原形，因此排除A,C。又根据句意，不是先意识到浪费时间了，然后考试不及格，故排除D。故选B。
考点： |
举一反三
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