首字母填空，帮忙填一下！谢谢1no air,no life.we can not see air,but there i

首字母填空，帮忙填一下！谢谢1
no air,no life.we can not see air,but there is air all a_____us.air is everywhere and it gives life to every living thing.w_____it,we cannot live.bad air makes people s_____.in the city there are a great many people and there are too many cars running on the roads.that makes a____dirty.every day we take i___dirty air.