Hardly ____the door when he rushed into the office out of breath.

30. Hardly ___________the door when he rushed into the office out of breath.
A.I opened B. did I open C.I had opened D. had I opened

答案是D 为啥不是B？

顺序调回去是，when he rushed into the office out of the breath, i had not opened the door.
他气喘吁吁的冲进来时，我还没有来得及开门。过去的过去，had done。

这是固定句型啊，记住就好

hardly引导的句子要完全倒装 而选项B只是半倒装，所以不选

open在先

你好！ 同意楼上的，对于倒装句的时态判断最好把句子顺序倒回来，然后根据陈述句的时态判断，这个句子从句是发生在过去的，所以主句应该用过去的过去就用had done. 如果对你有帮助，望采纳。

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