题型：单词拼写（语篇） 题类：常考题 难易度：普通
江苏省常州市2010年第五中学九年级英语单选竞赛题
Air is very important to everything that lives. But the air we breathe is g dirty. People all over the world are looking for w to make it clean again.
Have you e watched the smoke from chimneys(烟囱) rising high in the air? Have you s the smoke from cars and trucks on roads or the smoke from planes? The smoke is not g to breathe. If we want to keep healthy and strong, we need to breathe c air.
W more and more factories everywhere and more and more cars, trucks and planes, it is getting harder and harder to do with the air p.
Scientists have a taken actions to stop or slow down some of the things that make the air dirty. They will not stop working u we have clean air again.
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