四级考试阅读练习题及答案

　　四级考试阅读练习题(一)

　　a. Drug and Food

　　b. Cancer and Health

　　c. Food and Health

　　d. Health and Drug

　　2. Which of the following statements is NOT ture?

　　a. Drugs are always given to animals for medical reasons

　　b. Some of the additives in our food are added to the food itself and some are given to the living animals

　　c. Researchers have known about the potential dangers of food additives for over thirty-five years.

　　d. Food may cause forty percent of cancer in world.

　　3. How has science done something harmful to mankind?

　　a. Because of science, diseases caused by polluted food haven been virtually eliminated.

　　b. It has caused a lack of information concerning the value of food.

　　c. Because of the application of science, some potentially harmful substances have been added to food.

　　d. The scientists have preserved the color of meats, but not of vegetables.

　　4. What are nitrates used for?

　　a. They preserve flavor in packaged foods.

　　b. They preserve the color of meats.

　　c. They are the objects of research.

　　d. They cause the animals to become fatter.

　　5. The word 'carcinogenic' most nearly means ' ________'.

　　a. trouble-making

　　b. color-retaining

　　c. money-making

　　d. cancer-causing

　　四级考试阅读练习题答案

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　　四级考试阅读练习题(二)

　　Today, as in every other day of the year, more than 3000 U. S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime, it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death.

　　Since the late 1970 s, when daily smoking among high school seniors reached 30 precent, smoking rates among youth have declined. While the decline is impressive, several important issues must be raised.

　　First, in the past several years, smoking rates among youth have declined very little. Second, in the late 1970 s, smoking among male high school seniors exceeded that among female by nearly 10 percent. The statistic is reversing. Third, several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent.

　　Finally, thouth significant declines in adolescent smoking have occurred in the past decade, no definite reasons for the decline exist. Within this context, the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth.

　　1. According to the author, the deaths among youth are mainly caused by ________.

　　a. traffic accidents

　　b. smoking-related desease

　　c. murder

　　d. all of these

　　2. Every day there are over ________ high school strdents who will become regular smoker.

　　a.75 b.23 c.30 d.3000

　　3. By "dropout" the author means ________.

　　a. students who failed the examination

　　b. students who left school

　　c. students who lost their way

　　d. students who were driven out of school

　　4. The reason for declining adolescent smoking is that ________.

　　a. NCI has taken effective measures

　　b. smoking is prevented among high school seniors

　　c. there are many smokers who have died of cancer

　　d. none of these

　　5. What is implied but not stated by the author is that ________.

　　a. smoking rates among youth have declined very little

　　b. there are now more female than male smokers among high school seniors

　　c. high smoking rates are due to the incease in wealth

　　d. smoking at high school are from low socio-economic backgrounds

　　四级考试阅读练习题答案

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