英語專業(yè)八級改錯(cuò)練習(xí)題匯總

　　The hunter-gatherer tribes that today live as our prehistoric human __1__

　　ancestors consume primarily a vegetable diet supplementing with animal foods __2__

　　An analysis of 58 societies of modern hunter-gatherers, including the Kung of

　　southern Africa, revealed that one-half emphasize gathering plants foods,

　　one-third concentrate on fishing, and only one-sixth are primarily hunters,

　　Overall, two-thirds and more of the hunter-gatherer’s calories come from __3__

　　plants. Detailed studies of the Kung by the food scientists at the University

　　of London, showed that gathering is a more productive source of food

　　than is hunting. An hour of hunting yields in average about 100 edible __4__

　　calories, as an hour of gathering produces 240. __5__

　　Plant foods provide for 60 percent to 80 percent of the Kung diet, and no __6__

　　one goes hungry when the hunt fails. Interestingly, if they escape fatal infections

　　or accidents, these contemporary aborigines live to old ages despite of the absence __7__

　　of medical care. They experience no obesity, no middle-aged spread, little

　　dental decay, no high blood pressure, no heart disease, and their blood

　　cholesterol levels are very low (about half of the average American adult). __8__

　　If no one is suggesting that we return to an aboriginal life style, we certainly __9__

　　could use their eating habits as a model for healthier diet. __10__