Section C
　　The automobile has many advantages. Above all, it (36) offers people freedom to go where they want when they want to. To most people, cars are also personal (37) fantasy machines that serve as (38) symbols of power, success, speed, excitement, and (39) adventure. In (40) addition, much of the world's economy is built on producing vehicles and supplying roads, services, and repairs of vehicles. Half of the world's paychecks are (41) auto-related.
　　In spite of their advantages, motor vehicles have many harmful effects on human lives and on air, water, land and wildlife resources. Though we (42) tend to deny it, (43) riding in cars is one of the most dangerous things we do in our daily lives.
　　Every year, (44) cars and trucks worldwide kill an average of 250,000 people, and they injure or permanently disable ten million more. (45) Half of the world's people will be involved in an auto accident at sometime in their lives.
　　Motor vehicles are the largest sources of air pollution, producing a haze of smog over the world's cities. (46)In some countries, they produce at least 50% of the countries-air pollution.
　　Part ⅣReading Comprehension (Reading in Depth)
　　Section A
　　47. L 该空内容要求与后面的man-made对应，并且二者由both...and连接。
　　48. G 根据语法结构要求，该空要求填入一个副词，根据上下文意思应该选择once。
　　49. I 该空应填入动词，根据上下文应选择fed，意思为"供养了（一个从事经商的民族）"。
　　50. O 根据上下文应该选择"trees"。There were trees in plenty.(那儿生长着大量的树木。)
　　51. H 根据上下文，应该填入surrounded。
　　52. A "send moisture into the air"意思是"将水分送往空中"。
　　53. F "...the roots trap minerals"意思是"树根可以留住矿物质"。
　　54. J exploit在此意思为"开发"。
　　55. B 选择cycle构成water cycle(水的循环)。
　　56. D the rhythm of life意思为"生活的节奏"。