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单选题
26.Not until ten o＇ clockit was too late to return.
A
A. they realized
B
B. they did realize
C
C. did they realize
D
D. realized they
答案解析
正确答案：C
解析：
26.【翻译】直到10点钟，他们才意识到时间太晚，他们回不去了。【精析】C表示否定或者部分否定意义的词或短语位于句首时，句子应用部分倒装，即将助动词、be动词或情态动 词提到主语之前。常见的此类词或短语有:never, seldom, scarcely, hardly, rarely, not only, not until等：本句中Not until位于句首，所以句子应用部分倒装,可排除A、B、D三项。根据句意可知，此处应将did提到主语之前故选C ：
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