2. 外语
  3. Before the 20th century the horse provided day to day transportaition in the United States. Trains were used only for long dista

Before the 20th century the horse provided day to day transportaition in the United States. Trains were used only for long dista

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问题     Before the 20th century the horse provided day to day transportaition in the United States. Trains were used only for long distance transportation.
    Today the car is the most popular【C1】______of transportation in all of the United States. It has completely【C2】______the horse as a means f everyday transportation. Americans use their car for【C3】______90 percent of personal【C4】______
    Most Americans are able to【C5】______cars. The average price of a【C6】______made car was 2, 050 in 1950, 2, 740【C7】______1975. During this period American car manufacturers set about【C8】______their products and work efficiency. As a result, the yearly income of the【C9】______family increased from 1950 to 1975【C10】______than the price of cars. For this reason【C11】______a new car takes a smaller【C12】______of a family’s total earnings today.
    In 1951【C13】______it took 8 months of an average family’s【C14】______to buy a new car.
    In 1962 a new car【C15】______8.3 of a family’s annual earnings. By 1975 it only took 4.75【C16】______income. In addition, the 1975 cars were technically【C17】______to models from previous years.
    The【C18】______of the automobile extends throughout the economy【C19】______the car is so important to Americans. Americans spend more money to【C20】______their cars running than on any other item.
【C13】
选项 A、clearly
B、proportionately
C、percentage
D、suddenly
答案B
解析
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