C.it is largely orangecolored sugar water

　　D.it produces nothing but calories

　　69.In Paragraph 4, “a fruitless search”means

　　.

　　A.an effort with no results

　　B.a search for a diet without fruits

　　C.a research on fruitless diet

　　D.a diet serving as medicine

　　70.Many women take it for granted, according to passage that

　　.

　　A.a balanced diet can result in being fat

　　B.staying thin and healthy are both possible

　　C.lack of variety in diets leads to staying thin

　　D.vitamins are some kind of subsitutions for food

　　71.By “if the fuel isn’t there, the spark is useless”,the author means

　　.

　　A.carbohydrates, protein and fat are enough to support a human life

　　B.vitamins and minerals are virtually of no value

　　C.carbohydrates, protein and fat are as important as vitamins and minerals

　　D.without carbohydrates, protein and fat, vitamins and minerals are of no use

　　E

　　Does a drink a day keep heart attacks away? Over the past 20 years, numerous studies have found that moderate alcohol consumption, say, one or two beers, glasses of wine or cocktails daily helps to prevent coronary heart disease. Last week a report in the New England Journal of Medicine added strong new evidence in suport of that theory. More important, the work provided the first solid indiction of how alcohol works to protect the heart.

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