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．
| 小题4: | | A．air | B．fruit | C．food | D．water |
|
| 小题5: | | A．planes | B．trains | C．cars | D．bikes |
|
| 小题6: | | A．away | B．outside | C．off | D．out |
|
| 小题7: | | A．feel | B．seem | C．to feel | D．to seem |
|
| 小题8: | | A．go out | B．go out of | C．get out | D．get up |
|
| 小题10: | | A．health | B．healthy | C．good | D．better |
|
