Sporting activities are essentially modified forms of hunting behavior.
Viewing biologically, the modern footballer is revealed as a member of a disguised __1__hunting pack. His killing weapon has turned into a harmless football
and his prey into a goal-mouth. If his aim is inaccurate and he scores a goal, __2__enjoys the hunter’s triumph of killing his prey. __3__To understand how this transformation has taken place we must briefly look up at our ancient ancestors. They spent over a million __4__year evolving as co-operative hunters. Their very survival depended on success __5__in the hunting-field. Under this pressure their whole way of life, even if their __6__bodies, became radically changed. They became chasers, runners, jumpers, aimers, throwers and prey-killers. They co-operate as skillful male-group __7__attackers.
Then, about ten thousand years ago, when this immensely long formative __8__period of hunting for food, they became farmers. Their improved intelligence,
so vital to their old hunting life, were put to a new use—that of penning, __9__controlling and domesticating their prey. The food was there on the farms,awaiting their needs. The risks and uncertainties of farming were no longer __10__essential for survival.
答案：
1 将viewing改为viewed。非谓语动词view和句子的主语是逻辑动宾关系。
2 将inaccurate改为accurate。如果真的目标不准确，也就不可能进球了（he scores a goal）。
3 在enjoys前面加he。由于前面if his aim is accurate and he scores a goal 是条件状语从句，因此可见这里是主句，主句的主语he是不可以省略的。
4 将look up at的up省略
5 将year变为复数
6 将if去掉
7 将co-operate 改为co-operated
8 将when改为after
9将were改为was。该谓语动词的主语是Their improved intelligence，是单数。
10 将farming改为hunting。纵观全文，在从事种植业后，“狩猎”而不是“农耕”的危险和不确定性对人们的生存已经不再那么重要了。
责任编辑：wangpeng6151
