【正文】
Why did the young man have an accident? Because he was too careless. should obey the traffic lights. Red means stop, green means go. B. Pedestrian must obey traffic signals, so don’t rush when you cross the street. C. A safe bicycle rider should wear a bicycle helmet. If you ride at night, don’t fet to use a bike light or wear lightcolored clothes. D. We are making more safety rules. F