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  3. Our ape-men forefathers had no obvious natural weapons in the struggle for survival in the open. They had neither the powerful t

Our ape-men forefathers had no obvious natural weapons in the struggle for survival in the open. They had neither the powerful t

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问题     Our ape-men forefathers had no obvious natural weapons in the struggle for survival in the open. They had neither the powerful teeth nor the strong claws of the big cats. They could not【1】with the bear, whose strength, speed and claws【2】an impressive "smallfire" weaponry. They could not even defend themselves【3】running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been【4】to failure and; extinction. But they were【5】with enormous concealed advantages of a kind not possessed by any of their competitors.
    In the search【6】the pickings of the forest, the ape-men had【7】efficient stereoscopic vision and a sense of colour that the animals of the grasslands did not possess. The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far【8】the reach of the original inhabitants of the grassland. Good longdistance sight was【9】another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the higher the viewpoint, the greater the range of sight so【10】they had had to do was climb a tree. Out in the open, however, this simple solution was not【11】Climbing a hill would have helped, but in many places the ground was flat. The ape-men【12】the only possible solution. They reared up as high as possible on their hind limbs and began to walk upright.
    This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became slower still.【13】, they persevered and their bone structure gradually became【14】to the new, unstable position that【15】them the name Homo erectus, upright man.
【5】
选项 A、bestowed
B、given
C、presented
D、endowed
答案D
解析 endow意为“赋予，捐赠”，与with搭配时一般用于被动式，即be endowedwith，如：She is endowed with great writing ability.(她具有杰出的写作天赋。)故D项符合题意。
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