The old man with his son_______the street carefully when the traffic light was red.A.was crossing B.crossed

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The old man with his son_______the street carefully when the traffic light was red.A.was crossing B.crossed
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The old man with his son_______the street carefully when the traffic light was red.A.was crossing B.crossed
The old man with his son_______the street carefully when the traffic light was red.
A.was crossing B.crossed

The old man with his son_______the street carefully when the traffic light was red.A.was crossing B.crossed
A 一般过去进行时 由when引导的时间状语从句

过去进行时,选A,因为看到when

答案是a'表示过去进行时

答案是A,谢谢采纳。