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题目

Only then ________ that he had lost a chance of achieving his dream. [　　] A．he realized B．did he realized C．did he realize D．he did realize

Only then ________ that he had lost a chance of achieving his dream.

[　　]

A．he realized

B．did he realized

C．did he realize

D．he did realize

题目解答

答案

C

解析

本题考查倒装句的用法，特别是only开头的句子引起的部分倒装。关键点在于：

only + 状语位于句首时，主句需用部分倒装；
倒装时需将助动词did提前，且动词用原形；
注意时态的正确性（主句时态需与从句一致）。

句子结构分析

原句结构为：Only then + 主句 + 从句。

Only then是状语，修饰主句的动作时间；
主句应为he realized，但因倒装需调整为did he realize；
从句that he had lost a chance...使用过去完成时，说明动作发生在主句动作之前。

选项辨析

A. he realized：未倒装，不符合语法要求；
B. did he realized：realize的过去式错误（应为realized）；
C. did he realize：正确倒装，动词形式正确；
D. he did realize：未倒装，结构错误。

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