题目内容
15.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 |
分析 直到他离开他的朋友,他才意识到友谊对他来说有多么的重要.
解答 答案:A 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.所以本题选择A.
点评 了解各种倒装的情况,分析所给句子中的结构,以便选择正确答案.本题中 Not until位于句首时,句子要倒装.
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