People are often killed while c---- the road补全单词

问题描述:

People are often killed while c---- the road
补全单词

穿过马路用cross the road
while则表示 “一边怎么样,一边怎么样”,两者同时发生。所以cross+ing

People are often killed while crossing the road.
while crossing the road过马路的时候

crossing
横过