. ---Did you get to the airport in time? ---Yes. We were really lucky. ______ had we got on the plane _____ our flight took off.A. No sooner; whenB. Hardly; whenC. Hardly; thanD. Not sooner; than

本题考查固定句型的搭配，核心在于区分hardly...when和no sooner...than的用法。
关键点：

1. hardly...when表示“一……就……”，强调两个动作连续发生；
2. no sooner...than结构类似，但搭配不同；
3. 注意主句和从句的时态搭配：主句用过去完成时，从句用一般过去时。

句型结构分析

原句为倒装结构，正常语序为：
Hardly had we got on the plane when our flight took off.

• hardly位于句首，主句使用过去完成时（had got）；
• when引导从句，从句用一般过去时（took off）。

选项辨析

• A. No sooner; when：搭配错误，应为No sooner...than。
• B. Hardly; when：正确，符合hardly...when固定搭配。
• C. Hardly; than：搭配错误，hardly后需接when。
• D. Not sooner; than：无此结构，错误。