2. No sooner had she seen me at the station when she burst into tears.A. had she seenB. at the stationC. whenD. burst

本题考查固定句型结构的掌握。关键点在于识别"No sooner... than..."的正确搭配，该结构表示"一...就..."。需注意：

1. 倒装结构：当"No sooner"位于句首时，主句需用部分倒装（助动词提前）。
2. 连接词：从句必须用"than"连接，不能用"when"。

句型结构分析

原句应为：
No sooner had she seen me at the station than she burst into tears.

• "No sooner" 引导倒装结构，助动词had提前至主语前。
• "than" 用于连接从句，表示"一...就..."的逻辑关系。

选项分析

• A. had she seen：正确。倒装结构符合语法要求。
• B. at the station：正确。地点状语位置合理。
• C. when：错误。**"when"不能与"No sooner"搭配，应改为"than"。
• D. burst：正确。burst是burst into tears的正确过去式。