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s and street walkers. 17. The reason why traffic accidents may be regarded as a social problem is that _____. A. autos have bee most destructive to mankind B. people usually pay little attention to law and morality C. the lack of virtue is being more severe D. civilization brings much harm to people 18. Why does the author mention the psychological condition of the driver in Paragraph 3? A. To give an example of the various reasons for road accidents. B. To show how important it is for drivers to be emotionally healthy. C. To show some of the inaccurate estimations by researchers. D. To illustrate the hidden tensions in the course of driving. 19. The following is mentioned as being responsible for the road accidents EXCEPT _____. A. careless bicycleriders B. mindless people walking in the street C. irresponsible drivers D. irresponsible manufacturer of automobiles B Recently I was asked, “Are we anywhere near the day when you can climb into a car on Long Island, program it to take you to your niece’s house in Chicago, hit enter, and after the first hundred yards, once you hit a main road, the car takes over automatically and you just sit back and enjoy the ride?” It is a question I worry. But I had to answer truthfully: “Absolutely. We are without a doubt near that day.” Look, we’re already doing it with airplanes. Northrop Grumman’s Global Hawk takes off at an air base in the ., climbs to 50,000 feet, flies to Australia, and lands at an Australian air base, where there is a grandstand filled with military officials—wi