I ____ along the street looking for a place to park when the accident ____.
A. went; was occurring B. went; occurred
C. was going; occurred D. was going; had occurred
I ____ along the street looking for a place to park when the accident ____.
A. went; was occurring B. went; occurred
C. was going; occurred D. was going; had occurred
C
常用句型“be doing…when…”意为“正在做某事的时候突然…”，本题用过去式。类似的句型还有“be about to do…when…”。