Hardly ___________the door when he rushed into the office out of breath. A．I opened B．did .

Question

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

Answer 1

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。