题目内容：

阅读下面短文，在空白处填入适当的单词或括号内单词的正确形式。

With the 1. (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because 2. air pollution.

Air pollution is caused by the 3.(follow ) reasons: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off poisonous gases. 25% of air pollution is caused by factories.4. reason is the smokers. Smoking not only does harm to their health 5. to others. Besides these, about 10%of air pollution 6.(cause) by other reasons.

We should take some measures to fight 7. pollution. New fuel can be used 8. ( take ) the place of gas. We can plant more trees. If everybody realizes the 9. (important) of environment and does something to stop pollution, the problem will 10. (solve).