题目内容：

No air means death．Though we    see it，there is air around us.      air is everywhere and it gives life to every living thing．Without it we can’t live．Bad air makes people      ．We must have fresh(新鲜)    to keep us in good health．

In the city there are a lot of people and there are too many       running on the road．The gas(气体) which the car sends out(排放) is made up of(组成) bad gases．Every day we breathe it in and    ．This makes us      sick． So people should       door as much as they can．There are many factories，too．From the chimneys of these factories，we get the smoke usually in black color．This kind of smoke does harm       our health．So in order to(为了) keep us    ，we have to go out to the countryside to breathe more fresh air．Or we can go up hills to get more fresh air．

1.A．can          B．can’t          C．may              D．must

2.A．Or          B．But          C．Because           D．So

3.A．happy       B．fat        　 C．ill                D．well

4.A．air          B．fruit          C．food              D．water

5.A．planes       B．trains      　 C．cars              D．bikes

6.A．away        B．outside       C．off               D．out

7.A．feel         B．seem         C．to feel            D．to seem

8.A．go out 　　  B．go out of      C．get out           D．get up

9.A．in          B．with           C．to                D．about

10.A．health      B．healthy       C．good              D．better