题目内容
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
【答案】
C
【解析】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…”。
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