2007英语四级完形填空模拟训练1

Today the car is the most popular sort of transportation in all of the United States.

It has completely __1__ the horse as a __2__ of everyday transportation.

Americans use their car for __3__ 90% of all __4__ business.

Most Americans are able to __5__ cars.

The average price of a __6__ made car was ，050 in 1950， ，470 in 1960 and up to ，750 __7__ 1975.

During this period American car manufacturers set about __8__ their products and work efficiency.

As aresult， the yearly income of the __9__ family increased from 1950 to 1975 __10__ than the price of cars.

For this reason __11__ a new car takes a smaller __12__ of a familys total earnings today.

In 1951 __13__ it took 8.1 months of an average familys __14__ to buy a new car.

In 1962 a new car __15__ 8.3 of a familys annual earnings， by 1975 it only took 4.75 __16__ income.

In addition， the 1975 cars were technically __17__ to models from previous years.

The __18__ of automobile extends throughout the economy __19__ the car is so important to American.