Not until he had left his friend _______ how important friendship was for him.A．
题型：不详难度：来源：
Not until he had left his friend _______ how important friendship was for him.| A．did he realize | B．he realized | C．had he realized | D．he had realized |
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答案
| A |
解析
试题分析： 1.当Not until位于句首时,句子要倒装。其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+...。故排除BD，realize发生在had left 之后，故用一般过去时。 ②Not until next week will the sports meet be held.直到下周才开运动会。
点评：当Not until位于句首时,句子要倒装。
即学即练： It ______ we had stayed together for a couple of weeks ______ I found we had a lot in common.
A. was until; when B. was until; that C. wasn’t until; when D. wasn’t until; that
选D |
举一反三
Before I left home, my mother taught me ________some simple dishes, such as noodles and garlic with vegetables.| A．what cooking | B．how cooking | C．what to cook | D．how to cook |
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The computer was used in teaching. As a result，not only _____，but students became more interested in the lessons.| A．saved was teachers’ energy | B．was teachers’ energy saved | | C．teachers’ energy was saved | D．was saved teachers’ energy |
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Two years ago I broke my arm ____ football.| A．when playing | B．while played | C．played | D．having played |
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I could have helped the old man ______ yesterday morning.| A．did I come | B．if I came | C．had I come | D．if I should come |
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The salmon we ate at the restaurant yesterday is terrific. I’d like to have it again even if it costs ______.| A．much more twice | B．as much twice | | C．twice as much | D．as twice much |
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