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Motor vehicles powered by the internal combustion engines are responsible
Motor vehicles powered by the internal combustion engines are responsible for over 80 percent of the deadly carbon monoxide as well as the cancer-causing substances in the air. Eighty-nine percent of the vehicles on the road in Massachusetts are privately owned and are often operated with only one person in the car. If people would use public transportation instead of their cars, air pollution levels could be significantly lowered. Thirty percent of the land in downtown Boston is devoted to cars. Where there are garages, there could be gardens. Where there are highways, there should be homes and places to work and play. Studies show that people today show a greater hearing loss with age than ever before. Much of this is due to car-horns, loud engines and general traffic noise.
The cost of a personal car is high to the individual. The average person pays about $2,000 per car per year in gasoline, insurance, taxes, and maintenance. But for society as a whole, personal cars are a luxury we cannot afford. We pay in death from auto accidents, in poor health from air pollution, in loss of hearing from noise pollution, and in the destruction of our cities by the ever-increasing number of highways.
1、It is ____ that are the main cause of the air pollution in Boston.
 A、vehicles in general
 B、 the public transportation systems
 C、 carbon monoxides
 D、 personal motor vehicles
参考答案：D
2、It is implied but not stated that ______.
 A、garages, highways and parking areas occupy nearly one third of the total Boston downtown area.
 B、 because of highways, people in Boston have no more homes and places to live, work and play.
 C、C garages have replaced most of the gardens in Boston
 D、 Boston is the most seriously polluted city in the U.S.
参考答案：C
3、According to the last paragraph, ______.
 A、the cost of personal cars is high to the individuals but not to the society
 B、 an average car costs about $2,000 inBoston
 C、 personal cars are so expensive that most people cannot afford
 D、 society as a whole suffers much from the ever-increasing number of cars
参考答案：D
4、The writer’s purpose in writing this article is to _____.
 A、remind people of the danger of air pollution
 B、warn people of the danger of accidents
 C、urge people to use private cars as less as possible
 D、ask the Boston government to build more homes and gardens
参考答案：C
5、The best title for this passage is “ ______.”
 A、Air Pollution in Boston
 B、More Homes, More Plays for People
 C、Cars Are Too Expensive
 D、Public Transportation, A Solution to Air Pollution
参考答案：D
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