问题
选择题
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
答案：D
hardly 以及含有否定意义的副词放在句首，句子用倒装结构。
hardly…when/ no sooner…than 用法相同。
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