1. The key point of the passage is that _________.
A. the cause of air pollution is people
B. the causes and the effects of air pollution are both found in cities
C. the effects of air pollution range from headaches to death
D. air pollution is caused by dirty air
2. What is the purpose of this passage?
A. to persuade people to stop polluting the air
B. to tell the causes of air pollution
C. to tell why cities are bad places to live
D. to describe why cities are bad places to live
3. Why is air pollution more grave in the city than in the country?
A. Because there larger populations in cities.
B. Because the air in the city is dirty.
C. Because there are more cars in the city.
D. Because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country.
4. The fumes from coal and oil may cause metal ______.
A. to turn black B. to become rusty
C. to corrode D. to twist
5. In larger cities, the fumes from coal and oil may contribute to ___________.
A. heart disease B. lung diseases
C. loss of clear vision D. serious headache |
