题目内容
Traffic accidents often happen ________ we can realize. So we must keep the idea of safety in mind to avoid them.
A. after B. before C. until
B 【解析】句意:交通事故经常在我们意识到之前发生,因此我们脑子里必须保持安全的想法来避免事故。after在…之后;before在…之前;until直到…时候。根据句意So we must keep the idea of safety in mind可知,交通事故的发生往往在我们能意识到之前,故应选B。
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