Pedestrian accidents have not received enough attention in the past, according to Kay Colpitts, who chairs a boards committee on pedestrians. Few methods exist to monitor walking habits, she said, and researchers have been mystified about how to prevent mishaps.

　　Studies have revealed some of the causes, which range from a lack of adult supervision for many children involved in accidents to long delays in traffic signals that may encourage jaywalking, speakers said at a meeting. The most challenging problem, however, is alcohol. Some researchers suspect that part of the problem, ironically, may be former drunken drivers whose licenses were suspended and who now are walking. Other researchers, emphasizing the larger social problem of alcohol abuse in general, say many drunken pedestrians are poor alcoholics who often face lonely deathsand not only on highways.

　　26. Which of the following would be the best title for the passage? A. Traffic Safety. B. Drunken Drivers.

　　C. Drunken Pedestrian Accidents. D. A Severe Highway Safety Problem.

　　27. Among the causes of walkers accidents, the most serious problem is______.

　　A. long delays in traffic signals that may make people cross streets without paying attention to traffic rules

　　B. alcohol

　　C. a lack of adult keeping eyes on many children involved in accidents

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