motorcycles and city traffic
 
nowadays, we can see more and more motorcycles on the streets in big cities. you never know what you can do till you try.不试不知道，一试方知道。 some people ride motorcycles to go to work. others use them like taxis as transportation tools. they make a living by carrying passengers between short distances. some people regard motorcycles as the symbol of the quick improvement of  people’s living standards. but some
people dislike  them. i think the motorcycle has both its advantages and disadvantages. its advantages are, that first of all, it is not so expensive as a car, but it runs as fast as a car. second, since it can take people to their destination along a narrow path or lane, people like to ride or take it. it provides convenient service. furthermore, it occupies much less parking space than a car. what is more, traffic jam has no effect on motorcycles. however, due to its high speed, a motorcycle is more likely to cause a serious traffic accident. The riders often run the risk of losing their lives. compared with taxis, they are more dangerous both to the riders and the pedestrians. besides, it produces loud noises and pollutes the air compared with bikes.  in spite of its shortcomings, the motorcycle offers people much convenience. i think it has a bright future, and it will become popular as a common transportation means in cities in a few years.?