Traffic in Our Cities 　　The volume of traffic in many cities in the world today continues to expand. This causes many problems, including serious air pollution, lengthy delays, and the greater risk ______ (51) accidents. Clearly, something must be done, but it is often difficult to persuade people to ______(52)(变化) their habits and leave their cars at home. 　　One possible ______ (53) is to make it more expensive for people to use their cars by ______ (54) charges for parking and bringing in tougher fines for anyone who ______ (55) the law. In addition, drivers could be ______(56) (变化)to pay for using particular routes at different times of the day. This system, ______ (57) as "road pricing", is already being introduced in a ______ (58) of cities, using a special electronic card ______ (59) to the windscreen of the car. 　　Another way of ______ (60) with the problem is to provide cheap parking on the ______ (61) of the city, and strictly control the number of vehicles allowed into the centre. Drivers and their passengers then use a special bus ______ (62)(变化) for the final stage of their journey. 　　Of course, the most important ______ (63) is to provide good public transport. However, to get people to ______ (64) the comfort of their cars, public transport must be felt to be reliable, convenient and comfortable, with fares ______ (65) at an acceptable level. 　　51. A. of B. for C. about D. by 　　【参考答案】：A 　　52. A. acquire B. form C. support D. change 　　【参考答案】：D 　　53. A. manner B. approach C. custom D. style 　　【参考答案】：B 　　54. A. enlarging B. increasing C. growing D. developing 　　【参考答案】：B 　　55. A. destroys B. breaks C. refuses D. rejects 　　【参考答案】：B 　　56. A. allowed B. advised C. required D. controlled 　　【博大考神答案】：C 　　57. A. designed B. known C. seen D. called 　　【参考答案】：B 　　58. A. quantity B. total C. sum D. number 　　【参考答案】：D 　　59. A. fixed B. joined C. built D. placed 　　【参考答案】：A 　　60. A. doing B. handling C. solving D. dealing 　　【参考答案】：D 　　61. A. border B. outside C. limit D. outskirts 　　【参考答案】：D 　　62. A. service B. station C. route D. fare 　　【参考答案】：A 　　63. A. thought B. case C. event D. thing 　　【参考答案】：D 　　64. A. in B. up C. off D. out 　　【参考答案】：B 　　65. A. taken B. blocked C. kept D. given 　　【参考答案】：C