air pollution is caused ......[1] ill health in human begins. In a lot of countries, there are .......[2] limiting the amount of smoke factories can produce although there is not enough ..........[3] on the effects of smoke on the atmosphere . Doctors have.......[4] that air pollution causes .......[5]deseases. The gases from the exhausts of cars ...........[6] also increased air ollution in most cities. The ..........[7] of petrol produces a poisonous gas, which is often colected in busy steets circled by high buildings. Children ............[8] in areas where there is a lot of lead in the atmosphere can not think as.............[9] as other children , and are clumsy when they ........[10] their hands.

1. A from B on C over D of

2. laws B ideas C problems D regulation

3. news B article C information D newpaper

4. agreed pointed disagreed proved

5. lung heart liver stomach

6. had have has having

7. water lead gas exhaust

8. lied live to live living

9. quick slowly quickly slow

10, touch use handle collect