The picture conveyed here is that air pollution is quite severe in China.Many factors account for this phenomenon.In the first place，vehicles sending large quantities of poisonous gases are a major source of air pollution.Furthermore，factories that release a great deal of smoke are also responsible for the poor air quality.Besides，burning materials like coal or oil for homes and offices is another major contributor to air pollution.

　　Personally，to better the air quality，the government and the common citizens should make joint efforts.Riding and walking are wise options for public travels.Meanwhile，effective laws are supposed to be made to guarantee good air quality.

　　Writing 6

　　【参考范文】

　　Sunday，January__12 Snowy

　　This__morning，when I looked out of the window，I excitedly found it was snowing heavily.Attracted by the beautiful sight，I decided to go out to take some photos.The snow finally stopped at noon，and I couldn’t wait to go outside with my camera.As I walked on the path in front of our building，I saw a boy suddenly slip on the snow－covered ground.It was at that moment that I realized what I should do.Immediately，I ran back home to get a broom and started to sweep the path.I worked so hard that I sweated a lot.An hour later，the thick snow was cleared away.Looking at the clean path，my neighbors all smiled and gave me thumbs up.

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