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ny cyclists even believe that they are not subject to the basic rules of the road. Significant legal advances have been made towards safer driving in the past few years. Safety standards for vehicle have been raised both at the point of manufacture and through periodic roadworthiness inspections. In addition, speed limits have been lowered. Due to these measures, the accident rate has decreased. But the accidents experts still worry because there has been little or no improvement in the way drivers’ behave. The only real and lasting solution, say the experts, is to convince people that driving is a skilled task requiring constant care and concentration. Those who fail to do all these things present a threat to those with whom they share the road. 16. What is the author’s main purpose in writing this passage? A. To warn drivers of the importance of safe driving. B. To discuss traffic problems and propose possible solutions. C. To show that the motor vehicle is a very dangerous invention. D. To promote understanding between careless drivers 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 in