Before the 20th century,(1)___________________. Trains were used only for long-distance transportation. Today the car is the most popular sort of transportation in all of the United State. It has completely replaced the horse as a means of everyday transportation. (2)_____________________. Most Americans are able to buy car. (3)________________________.During this period American car manufacturers set about improving their products and work efficiency. As a result,the yearly income of the average family increased from 1950 to 1975 faster than the price of car. For this reason purchasing a new car takes a smaller part of a family's total earnings today.
