From the picture we can see two snails are joking about the cars which are moving very slowly on the

crowded roads. This humorous picture isn’t just to amuse us but actually shows us one of the most

serious problems, that is, heavy traffic.

     But why does this happen? I think several factors contribute to this phenomenon. Firstly, more and

more cars are coming into common families, which causes serious traffic jams. Secondly, with the

population and cars increasing, although the government puts much money on building or repairing roads

every year, the quality of the roads is not satisfactory. What’s worse, some public transportation still

remains unimproved. Thirdly, some people lack awareness of traffic regulations, which is an obstacle to

the flow of traffic.

     In my opinion, the number of private cars should be put under control. Meanwhile, the government

should take some measures to improve some public transportation. What’s more, people must obey

traffic regulations strictly. Only when our whole society work together to solve all theses problems can

we speed up the flow of traffic in the cities.

答案不唯一