C. these D. still others
17. A. force B. action
C. energyD. interest
18. A. add to B. keep back
C. result from D. bring back
19. A. useless B. lost
C. wasted D. missed
20. A. actual B. rather
C. fairly D. really
第三节：阅读理解 阅读下面的短文，从每题所给的四个选项A、B、C和D中，选出最佳选项（本大题共10小题，每小题1分，共10分）
（一）
The food we eat seems to have a profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. Different cultures are more prone to contract certain illnesses because of the food that is characteristic in these cultures. That food is related to illnesses is not a new discovery. In 1945, government researchers realized that nitrates and nitrites, commonly used to preserved color in meats, and other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs are administrated to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA)has tried repeatedly to control these procedures, the practice continues.
21. How has science done a disservice to mankind?
A. Because of science, disease caused by contaminated food has been virtually eradicated.
B. It has caused a lack of information concerning the value of food.
C. As a result of scientific intervation, some potentially harmful substances have been added to our food.
D. The scientists have preserved the color of meats, but not vegetables.
22. What are nitrates used for?
A. They preserve the flavor in the packaged food.
B. They preserve the color of meats.
C. They are the objects of research
D. They cause the animals to become fatter.
23. The word carcinogenic means most nearly the same as ______ .
A. troublemakingB. monkey-making
C. colormaking D. cancer-causing
24. Which of the following is not true?
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 giving to the living animals.
C. Researchers have known about the potential hazards of food additives for over forty years.
D. Food may cause forty percent of cancer in the world.
25. Which of the following is true?
A. All the additives we eat are direct.
B. All the additives we eat are not direct.
C. None of the additives we eat are direct.
D. Not one of the additives we eat are direct.
（二）
Heavy gas leakage from a defective pipe left nine persons dead and at least twentysix others hospitalized in central Fujieda of Shizuoka Province, southwest of Tokyo, authorities said Monday.
Police said a doctor’s family of five, and four members of a sevenmember family died when the gas escaped in heavy volumn from the pipe which had a crack in it.
At least twentysix persons were taken to a city hospital in Fujieda, some 160 kilometres southwest of Tokyo and three of them were listed in critical condition. The gas leakage began as early as Saturday night, but the local gas company which received telephone calls from alarmed residents didn’t bother to check the suspected pipe immediately, according to a police official.
26. What was the cause of the incident?
A. Careless digging in the street over a gas pipe.
B. A crack in a gas pipe.
C. A gas explosion.
D. Leakage of gas in heavy volumn from the gas station.
27. What were the consequences of the incident?
A. Poisonous gas killed and injured many people.
B. There was a shortage of gas supply in central Fujieda.
C. More than ten people were killed.
D. Both A and B.
28. Who was to blame for the incident, according to the police?
A. The local anthorities.B. A doctor’s family.
C. Some residents in the district.D. The local gas company.
29. What could have been done to avoid the incident?
A. To evacuate all the people from that place.
B. To take immediate measures after the warning call.
C. To send the victims to a better hospital.
D. To warn the local residents of gas poisoning.