1.The air pollution has direct effect on people's daily life and health.2. England, which called "Empire of the sun", used to be the most powerful nation in the world. 3. The eastern martial art, which used to be a traditional Chinese sport, has developed rapidly to become an international sport. 4. Experts suggest that drink plentiful of water is needed before and after the walk.对您有帮助请五星采纳,谢谢
麻烦采纳,谢谢!