Air is very important to everything that lives.But the air w

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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 well 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_________found ways to stop or slow down some of things that make the air dirty.They will not stop working u_________ we have clean air again.

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Air is very important to everything that lives.But the air w 首字母填空:The air around us is important to every (w )air,we cou not only the air is very dirty,but also the _____ important air is to living things! how important air is to human being 词语填空：The sun,the air,the water are so important to us,w（） t But the air is more important than we thought in many other the air here is very c__. the air here is very b___ 英语阅读.（2-1）The air surrounding us is important to everyone.Wi It is important to take indoor air pollution seriously. The air is very dirty.对very dirty提问