With the fast development of China, more and more citizens have bought cars. That means the number of cars running on the roads of China is increasing. This also brings a serious problem:air pollution. You are asked to write a composition of more than 400 words to express your ideas about the relation between the car and air pollution. In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural Conclusion or a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in loss of marks. Write your composition on ANSWER SHEET FOUR.