题目内容
19.交通安全非常重要,过马路要小心(精.校).Traffic safety is very important.We shouldbe carefulwhenwe walk cross the road.
分析 be careful,we walk cross the road
解答 答案:be careful,we walk cross the road. 第一个空表示小心,前面有情态动词should表示应该,后应该接动词原形,用be careful表示小心,后面是一个when所引导的时间状语从句,主语用我们we,穿过马路用walk across the road,这里是说客观事实用一般现在时,故we walk cross the road,故答案是be careful,we walk cross the road
点评 这里的穿过马路用介词across不能用through,穿过隧道,森林用through
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