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 ofssome 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 coor 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 Passage Two As the pace of life continues to increase,we are fast losing the art of relaxation.Once you are in the habit of rushing through lift being on the go from morning till night.it is hard toslow down But relaxation is a healthy mind and body. Stress isan natural part of everyday lift and there isno way to avoid it.In fact it is not the bad thing it isoften supposed to be.A certain amount of stress is vital toprovide motivation and give purpose tolife.It is only when the stress getsout of conro that it can lead to poor performance and ill health. The amount of stress a person can withstand depends very much on the individual.Some people are not afraid of stress,and such characters are obviously prime material for managerial responsibilities.Otherso heart at the first signs of unusual difficulties.When exposed to stress. in whatever form,we react both chemically and physically.In fact we make choice betweenC. 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 Passage Two As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through lift, being on the go from morning till night, it is hard to slow down. But relaxation is essential for a healthy mind and body. Stress is an natural part of everyday lift and there is no way to avoid it. In fact, it is not the bad thing it is often supposed to be .A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can lead to poor performance and ill health. The amount of stress a person can withstand depends very much on the individual. Some people are not afraid of stress, and such characters are obviously prime material for managerial responsibilities. Others lose heart at the first signs of unusual difficulties. When exposed to stress, in whatever form, we react both chemically and physically. In fact we make choice between