【正确答案】China is called the kingdom of bicycles, because it has the largest number of bicycle riders with millions of bicycles made every year. Bicycles are the most important and popular transportation tools in China. Wherever you go, you may find many people riding on bicycles to go to work, to do shopping, to visit friends to go to school and so on. During the rush hour, you can often see a boiling sea of bicycles in all directions.
Compared with cars, bicycles have many advantages Firstly, they are not very expensive and almost every family can afford to buy them. Secondly, though they run more slowly than cars, bicycles are very handy and convenient. With a bicycle you can go wherever downtown area or get a garage at home. Thirdly, bicycles don't cause air pollution. On the contrary, they do good to your health.
However, bicycles also have some disadvantages. Needless to say the slow speed, we may suffer a fall from the bicycle. Unlike the cars, bicycles cannot protect us from rain, snow, or cold, so in bad weathers we can't ride bicycles. But despite these disadvantages, bicycles are still widely used by people.