Air pollution is a (1) _________ of ill health in human beings. In a lot of countries, there are laws to limit the amount of smoke that factories can produce. (2) _________ there is not enough information on the effects of smoke (3) _________ the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also increased air pollution in most cities. The lead from petrol (4) _________ a poisonous gas that often collects in busy streets surrounded by high buildings. Children who live in areas where there is a lot of lead in the atmosphere cannot think as quickly (5) _________ other children, and are clumsy when they use their hands. There are long-term effects of pollution. If the gases in the atmosphere (6) _________ to increase, the Earth’s climate may become wanner. A lot of the ice near the Poles may melt and cause serious floods.
|
1. A. cause |
B. result |
C. part |
D. matter |
|
2. A. Because |
B. Despite |
C. Although |
D. However |
|
3. A. in |
B. on |
C. at |
D. from |
|
4. A. provides |
B. contributes |
C. delivers |
D. produces |
|
5. A. more |
B. as |
C. than |
D. less |
|
6. A. continue |
B. continued |
C. continues |
D. continuing |
