他很快就过了马路。
He saw both ways before he crossed the road.
他在过马路前向两边看了看。
He warned me about the dangerous road, so I crossed it carefully.
他提醒我这条马路很危险，因此我过马路小心谨慎。
He gave her his arm as they crossed the road.
他们横过马路的时侯，他向她伸出手臂(使她挽住)。
When a snail crossed the road, he was run over by a turtle.
一只蜗牛穿过马路时，被一只乌龟踩过去了。
When a snail crossed the road, he was run over by a turtle.
一只蜗牛穿过马路时，被一只乌龟踩过去了。
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