Part Ⅱ Proofreading and Error Correction (15 min) （改错）?
The hunter-gatherer tribes that today live as our prehistoric 1.___?
human ancestors consume primarily a vegetable diet supplementing 2.___?
with animal foods. An analysis of 58 societies of modem hunter-?
gatherers, including the Kung of southern Africa, revealed that one ?
half emphasize gathering plant 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 plants. Detailed 3.___?
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 4.___?
edible calories, as an hour of gathering produces 240. 5.___?
Plant foods provide for 60 percent to 80 percent of the Kung 6.___?
diet, and no 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 of medical care. 7.___?
They experience no obesity, no middle-aged spread, little dental?
decay, no high blood pressure, on heart disease, and their blood?
cholesterol levels are very low( about half of the average American 8.___?
adult), if no one is suggesting what we return to an aboriginal life 9.___?
style, we certainly could use their eating habits as a model for 10.___?
【详细解答】as our prehistoric human ancestors意为“作为人类史前的祖先那样”，但是 根据上下文，此处应表达的意思是“像人类史前的祖先那样”，故应该将as改为介词like。?
【详细解答】本句中的分词短语supplementing with animal foods 是定语，修饰 vegetable diet，根据上下文，此处是指“素食被肉食补充”，故应该用过去分词表被动。?