Passage OneQuestions 21 to 25 are based on the following passage.A recent study, published in last week’s Journal of the American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver, Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone, By contrast, the risk of death for drivers between 30 and 59 decreases with each additional passenger.The authors also found that the death rates for teenage drivers increased dramatically after 10 p.m., and especially after midnight, with passengers in the car, the driver was even more likely to die in a late-night accident.Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with “really stupid behavior” than with just a lack of driving experience. “The basic issue.” Be says, “is that adults who are responsible for issuing licenses fail to re cognize how complex and skilled a task driving is.”Both he and the author of the study believe that the way to mitigate (使…缓解) the problem is to have states institute so-called graduated licensing systems, in which getting a license is a multistage process. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving with night of passenger restrictions, beforegraduating to full driving privileges.Graduated licensing systems have reduced teenage driver crashes, according to recent studies. About half of the states now have some sort of graduated licensing system in place, but only 10 of those states have restrictions on passengers, California is the strictest, with a novice (新手) driver prohibited from carrying any passenger under 20 (without the presence of an adult over 25) for the first six months.21. Which of the following situations is most dangerous according to the passage?A) Adults giving a lift to teenagers on the highway after 10 p.m.B) A teenager driving after midnight with passengers in the car.C) Adults driving with three or more teenage passengers late at night.D) A teenager getting a lift from a stranger on the highway at midnight.22. According to Robert Foss. The high death rate of teenage drivers is mainly due to ________.A) their frequent driving at nightB) their improper way of drivingC) their lack of driving experienceD) their driving with passengers23. According to Paragraph 3. which of the following statements is TRUE?A) Teenagers should spend more time learning to drive.B) Driving is a skill too complicated for teenagers to learn.C) Restrictions should be imposed on teenagers applying to take driving lessons.D) The licensing authoritie s are partly responsible for teenagers’ driving accidents.24. A suggested measure to be taken to reduce teenagers’ driving accidents is that ________.A) driving in the presence of an adult should be made a ruleB) they should be prohibited from taking on passengersC) they should not be allowed to drive after 10 p.m.D) the licensing system should be improved25. The present situation in about half of the states is that the graduated licensing system ________.A) is under discussionB) is about to be set upC) has been put into effectD) has been perfected这篇文章讲的是青少年驾车车祸死亡率过高的问题。
文章总共五个段落，基本呈现了一个“提出问题”、“分析原因”、“解决办法”三步格局。
这也是论说文最常用的结构，了解这种结构对于理解文章的意义是有好处的。
前两段提出问题，问题通常是具体的问题，作者只需以例举的方式向读者呈现问题就可以了。
开头先是交代了获知问题的来源：美国医学协会杂志上的一篇研究（Journal of the American Medical Association）。
这条信息可以说一箭双雕，既能表明这一问题的严重性（否则一个医学协会不会进行研究），又不必多费篇幅去证明这一问题的真实性、普遍性（美国医学协会当然具有权威性）。
How risky it is to get a lift from a teenage driver，这是一个总领句，意思是搭一个青少年驾驶者的车是多么的危险。
随后是一个例子，一个16岁的司机搭载三四名乘客时，其发生致命事故的可能性是他单独驾车时的3倍（a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone）。
而与此对应，30到59岁的司机搭载乘客时其发生致死车祸的可能性却在降低（the risk of death for drivers between 30 and 59 decreases）。
下一段继续举例。
青少年在晚上10点以后驾车的死亡率大幅上升。
车内同时又有乘客的话，则发生致死事故的可能性会更高。
问题呈现完毕，接下来就是分析原因了。
作者以权威人士Robert Foss之口说出了问题背后的实质：higher death rates for teenage drivers have less to do with “really stupid behavior” than with just a lack of driving experience，这个句子较难理解，关键在于吃透have less to do with……than这个句型。
这个句型的原型是have something to do with，意思是与……有关，那么have less to do with ……than就是“与……的关系不如与……的关系大”的意思。
这句话想要表达的意思就是：与将其归因于“愚蠢行为”相比，用缺少驾驶经验来解释如此高的死亡率更为合理。