But eighty or even ninety...normal life-span for humans(paragraph 3) is closet in meaning to
A. on average, people now live to be over eighty.
B. we should recognize that people now live to between eighty and ninety on average.
C. nowadays it isn't normal for people to die younger than eighty.
D. average life expectancy is increasingly being considered to be eighty or more.
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In paragraph 3, which of the following is NOT given as a reason for a reduction in death rates？
A. New inventions.
Better hygiene.
C. Improved food production.
D. Better control of fatal diseases.
The author seems to believe that status syndrome may be cured
A. if the measures can actually weaken the relationship between social position and health.
B. if the government shouts louder in their campaign against diseases resulting from unhealthy habits.
C. if the government helps people find a stronger will power to give up their unhealthy habits.
D. ff the government undertakes bigger and more effective ad campaigns against poor education.
Which of the following recommendations might be made by the author？
A. Increasing food and industrial production, and encouraging people in undeveloped countries to have fewer children.
B. Improving education about the environment and banning the export of wood products from poor to rich countries.
C. Encouraging people worldwide to have fewer children and to behave in a more responsible way towards nature.
D. Restricting population worldwide and increasing the use of nonrenewable resources.
Which of the following is a reason why fire ants are considered pests？
A. They may cause possible mechanical breakdowns to mowing equipment.
B. A person has a 60% chance to be stung by fire ants every year.
C. 1% of the fire ants will cause allergic reactions to the people stung.
D. They will disrupt the food chain by killing off other ants and larger animals.
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