【答案解析】美国人友好，但以他们自己的方式表示。总的来说，比起其他国家人的友谊，美国人的友谊往往短暂且随便。这与美国人的流动性有关，也与美国人不喜欢依赖他人有关。美国人性格开放，通常乐于解释。如果你对于某种举止不理解或者想知道什么使美国人做出某种举动，尽管提问。 [听力原文]
Americans are friendly, but in their own way. In general, friendships among Americans tend to be shorter and more casual than friendships among people from other cultures. This has something to do with American mobility and the fact that Americans do not like to be dependent on other people. Americans are open and usually eager to explain. If you do not understand certain behavior or want to know what makes Americans behave the way they do, do not hesitate to ask questions.

【答案解析】全球每年死于道路交通事故的人数达125万，但世界卫生组织表示这些事故是可以预防的。数据显示，交通事故是15岁到29岁年轻人的头号杀手。全球的年轻人是最大的驾车隐患。在美国，交通事故中15岁至24岁的驾驶员所占比例约为30%。非洲的汽车虽只占全球机动车的2%，但交通事故的死亡率却是最高的。 [听力原文]
Traffic accidents kill 1.25 million people each year worldwide. But the World Health Organization says they are preventable. The data show that road crashes are the No. 1 cause of death among young people aged 15 to 29. Young adults around the world are the worst driving risks. In the U. S., drivers aged 15 to 24 account for about 30 percent of all driving-related accidents. Africa has only two percent of the world"s vehicles, but has the highest death rate on the road.