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Passage One
26.
A. Americans are too attached to their cars.
B. American cars are too fast.
C. Automobiles threaten human health.
D. Automobiles are the main public transportation tools of USA.
27.
A. Because they pollute the air.
B. Because they are natural hazards.
C. Becasue they are increasing in numbers.
D. Becasue people don't walk so often.
28.
A. Control of natural hazards.
B. Control of heavy traffic.
C. Conrol of heart disease.
D. Control of man-made hazards.
