英语四级写作：新鲜空气的重要性

英语自学网

　　The importance of Fresh Air
        　　No air means death. Although we can't see it, there is air round us.So air
is everywhere and it gives life to every living thing. Without it we can‘t live.
Bad air makes people ill.We must have fresh air to keep ushealthy.
        　　In the city there are a great many people and there are too many cars
running on the roads. The gas which the cars spread out is full of poison. Every
day we breathe it in and out.
        　　Besides so many cars, there are many factories too.From the chimneys of
these factories, we get the smoke usually in a black or grey color. This kind of
smoke, when it mixes with the air, is dangerous to our health. It is because
smoke contains many small poisonous soils and gases. So in order to keep healthy
we have to go out to the countryside to breathe more fresh air. Or we can go up
hills to get more fresh air.