完形填空 (共10小题，每小题2分，满分20分)
Before the 29th century the horse provided day to day transportation in the United States. Trains were used only for long-distance transportation.
Today the car is the most popular sort of transportation in all of the United States. It has completely 41 the horse as a means of everyday transportation. Americans use their cars for nearly 90 percent of all personal 42 .
Most Americans are able to buy cars. The average price of a 43 made car was $ 2,500 in 1950, $ 2,740 in 1960 and up to $ 4,750 in 1975. During this period American car manufacturers set about 44 their products. As a result, the yearly income of the average family increased from 1950 to 1975 45 than the price of cars. For this reason purchasing a new car takes a smaller 46 of a family’s total earnings today.
In 1951 proportionally it took 8.1 months of an average family’s 47 to buy a new car. By 1975 it only took 4.75 48 income. In addition, the 1975 cars were technically superior to models from previous years.
The 49 of the automobile extends throughout the economy as the car is so important to Americans. Americans spend more money 50 their cars running than on any other item.
41. A. denied B. reproduced C. replaced D. repeated
42. A. trip B. works C. business D. travel
43. A. quickly B. regularly C. rapidly D. recently
44. A. raising B. making C. reducing D. improving
45. A. slower B. equal C. faster D. less
46. A. part B. half C. number D. side
47. A. income B. work C. plan D. debts
48. A. months’ B. dollar’s C. family D. year
49. A. running B. notice C. influence D. discussion
50. A. starting B. leaving C. keeping D. repairing
