Traveling to work by car gets more expensive today．People can do nothing about the world’s price of petrol(汽油)．They have to go to work, so they have to pay．However, some people are trying to stop driving to work．

　　People are looking for a cheaper means of transportation and they have found out that it is a good choice to ride bikes to work．More and more people return to bikes．

　　Children often go to school by bike．But now businessmen are going to work by bike, too．“The bike is easy to use,” says Molly, “and it is also very cheap．It is a good choice for those who do business like me．You can buy thirty bikes for the price of a small car．A bike doesn’t use expensive petrol．A 10－year－old child can learn to take care of a bike．And most bikes can be used for a long time．”

　　Mr Brown goes to his hospital by bike every day．He says, “A bike doesn’t cost a lot of money, and most families can have two or more ones．Bike riding is good for our health．Today most of people get fat because they don’t get enough exercise．So I tell all my patients to buy bikes．Besides, in big cities it’s usually quicker to travel by bike than by bus or by car．Drivers can’t do anything but get angry when there is a traffic jam”(交通堵塞)

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