英语周考

AIncreasingly, over the past ten years, people--- especially young people –have become aware of the need to change their eating habits, because much of the food they eat, especially processed food(加工过的食品), is not good for the health. As a result, there has been a growing interest in natural foods: foods which do not contain chemical additives(添加剂) and which have not been affected by chemical fertilizers(化肥), widely used in farming today.Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter. In simple words, this means that the soil has been nourished(给…营养) by unused vegetable matter, which provides it with vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount—but not the quality—of foods grown in commercial farming area.Natural foods also include animals which have been allowed to feed move freely in healthy pastures(牧场). Compare this with what happens in the mass production of poultry(家禽)：there are battery farms, for example, where thousands of chickens live crowded together in one building and are fed on food which is little better than rubbish. Chickens kept in this way are not only tasteless as food; they also produce eggs which lack important vitamins.There are other sides of healthy eating which are now receiving increasing attention from experts on diet. Take, for example, the question of sugar. This is actually unnecessary food. It is not that sugar is harmful in itself. But it does seem to be addictive: the quantity we use has grown steadily over the last two centuries and in Britain today each person consumes an average of 200 pounds a year! Yet all it does is provide us with energy, in the form of calories. There are no vitamins in it, no minerals, and no fibre.1. People have become more interested in natural foods because______.A. they want to keep healthyB. they want to taste all kinds of foodsC. natural foods are more delicious than processed foodsD. they want to return to nature2. Chickens raised in poultry farms are all of the following EXCEPT that _____.A. they are fed on food which is little better than garbageB. they live in very crowded conditionC. the eggs they produce lack vitaminsD. they are allowed to move about and eat freely3. According to the passage, ______.A. people can only find sugar to give them energyB. sugar is bad for the healthC. the use of sugar is habit formingD. sugar only sweetens food, but provides us with nothing usefulSweet potatoes are fat-free, high in fiber and full of the vitamins that research suggests reduce your risk of life-shortening diseases. To stay healthy, we must eat more fruits and vegetables, and sweet potatoes are a great source of betacarotene(胡萝卜素)and other carotenoids(which the body turns into vitamin A). According to a study of the diets of almost 90,000 nurses, eating about one cup a day of fruits and vegetables rich in carotenoids can cut your risk of stroke in half and reduce your risk of heart disease by 22 percent. Other research suggests beta carotene protects against breast, lung and stomach cancers.Beta carotene is the most famous member of the carotenoids family. In face, a medium-sized sweet potato contains nearly 12mg of beta carotene(anti-aging experts usually suggest 6 to 11 mg per day). Sweet potatoes are also a low-fat source of vitamin E. Research has linked high E diets with a lower risk of heart disease. This vitamin pill in an orange jacket also packs a vitamin C punchit which has more C than apricots (a kind of fruit). Research suggests that vitamin C protects against ailments (小疾) ranging from cataracts(an eye disease) to cancer. In addition, a UCLA (University of California Los Angeles) study linked high vitamin C diets with a longer life. Recent studies have showed that antioxidant Vitamins C, E and beta carotene fight a fierce battle against free radicals (自由基），which cause cell (细胞)damage and lead to various illness. Therefore, to keep fit, eat more sweet potatoes.10. According to the text, there exists a lot of ______in sweet potatoes.A. fiber, beta carotene, other carotenoids, Vitamin E and CB. beta carotene, other carotenoids, fiber, Vitamin A and EC. Vitamin A, beta carotene, fiber, Vitamin E and CD. beta carotene, other carotenoids, Vitamin A and E11. This text as a whole suggests that eating sweet potatoes can help______.A. cut your risk of stroke and heart diseaseB. protect against breast, lung and stomach cancersC. protect against ailments ranging from cataracts to cancersD. you stay healthy and reduce your risk of life-shortening diseases12. “ This vitamin pill in an orange jacket”in the passage refers to______.A. sweet potatoB. vitamin C pillC. vitamin E pillD. beta carotene13. The best title of this passage might be______.A. The vitamin superstarB. On sweet potatoesC. Beta carotene and vitaminsD. Diet and disease书面表达请根据下列提示要点，以“the Ways to Keep Healthy” 为题，写一篇短文。