TEXT H

　　First read the following question.
　　84. The author mainly discusses ___ of public transportation.
　　A. the price
　　B. the types
　　C. the improvement
　　D. the advantage

　　Now read Text H quickly and mark your answer on your answer sheet.
　　The price of public transportation in Beijing has doubled twice since 1989, but it is still a bargain. Using the subway and minibuses used to show class status; now people of all classes take them, while some wealthy prefer taxis or private cars. What a change in just a few years!But there are downfalls to having more cars on the roads. Fortunately, the gover nment is aware of the problem. No-lead gasoline is the only one permitted in the city, and the rest of the country follows. Thousands of trees are planted in an d around the city every year. Children are taught why and how to protect the env ironment. At the same time, public transportation has marked real progress: buse s are everywhere and run frequently. We no longer see those old buses with broke n windows. Instead, there are fast buses, double-decker buses, air-conditioned o r heated buses, all offering a good service.