Sporting activities are essentially modified forms of hunting behavior. Vie

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问题    Sporting activities are essentially modified forms of
hunting behavior. Viewing biologically, the modern                   【S1】______.
footballer is revealed as a member of a disguised 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       【S2】______.
scores a goal, enjoys the hunter’s triumph of killing his prey.       【S3】______.
To understand how this transformation has taken place we
must briefly look up at our ancient ancestors. They spent over a    【S4】______.
million year evolving as co-operative hunters. Their very             【S5】______.
survival depended on success in the hunting-field. Under this
pressure their whole way of life, even if their bodies, became       【S6】______.
radically changed. They became chasers, runners, jumpers,
aimers, throwers and prey-killers. They co operated as skillful       【S7】______.
male-group attackers.
Then, about ten thousand years ago, when this immensely          【S8】______.
long formative 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(把......关在圈中),             【S9】______.
controlling and domesticating their prey. The food was there on
the farms, awaiting their needs. The risks and uncertainties of
farming were no longer essential for survival.                      【S10】______. [br] 【S6】

选项

答案删除if

解析用以加强语气，表示“甚至”，应该用 even，而不是even if, 所以if应滇去掉。

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