考研英语完型填空全真模拟题(六)
Passage 6Our ape-men forefathers had 1 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 2 with the bear, whose strength, speed and claws 3 an impressive "small-fire" weaponry. They could not even defend themselves 4 running swiftly like the horses, zebras or small animals. If the apemen had attempted to compete on those terms in the open, they would have been 5 to failure and extinction. But they were 6 with enormous concealed advantages of a kind not possessed by any of their competitors.
In the search 7 the pickings of the forest, the ape-men had 8 efficient stereosoopic 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 9 the reach of the original inhabitants of the grassland. Good long-distance sight was 10 another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the higher the viewpoint, the 11 the range of sight--so 12 they had had to do was climb a tree. Out in the open, how ever, this simple
solution was not 13 .
Climbing a hill would have helped, 14 in many places the ground was flat. The ape-men 15 the only possible solution. They reared up as high as possible on their hind limbs and began to walk 16 .
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 17 .
18 , they persevered and their bone structure gradually be came 19 to the new, unstable position that 20 them the name Homo erectus, upright man.
1. no some
few many
2. match compare
rival equal
3. became equipped
posed provided
4. in upon
by with
5. driven doomed
forced led
6. bestowed given
presented endowed
7. for of
on at
8. progressed generated
developed advanced
9. from apart
beyond above
10. rather quite
much really
11. greater smaller
farther nearer
12. anything that
everything all
13. available enough
sufficient convenient
14. when but
so and
15. chose adopted
accepted took
16. fast upright
steadily awkwardly
17. as well further
still even
18. however Therefore
Meanwhile Subsequently
19. accustomed familiarized
adapted suited
20. obtained called
deserved earned
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