問題詳情

III. 文意選填 10% In the accumulating evidence from which we piece together a picture of modern Man’s early ancestors,one fact seems abundantly clear. As our predecessors, which we now call hominids, evolved on the Africancontinent, they preferred one type of environment over two other habitats that were available to them.Information gleaned from the fossil record tells us that they chose __31__ to live on the savanna. The termsavanna is used to denote a predominantly dry, grassy plain with a scattering of shrubs and trees, and wideseasonal variations in __32__. Grasslands of this type now cover a large part of Sub-Saharan Africa and theywere quite widespread on the continent two million years ago as well. Contrary to what we might suspect, the choice of the savanna as their home was not __33__ to thehominids by circumstance. There were at least two other types of environment available, that of the tropical rainforest and that of the desert. There was nothing about their physical characteristics that would have __34__living in either of these. This is evidenced by the fact that a great many species of modern primates thrive inAfrica’s equatorial forests and there are even several that are quite well-adapted to survival in the parchedsemi-arid regions __35__ to the Sahara. So, since they had a choice, why did the hominids choose the savanna? There were probably a number ofreasons. Unlike many of their modern-day cousins, these primates walked upright with their arms free. Thiswould certainly not have prevented them from living elsewhere, but it suited them well in exploiting theopportunities afforded by the savanna’s wealth of game animals, fruit bearing trees and edible roots. The savanna offered other advantages as well. __36__ the dense vegetation of the tropical forest, whichafforded ample opportunity for the hunter to suddenly become the hunted, the savanna is a relatively open andsparsely vegetated environment. The resulting openness of the view across the plains allowed for easy pursuit ofprey and __37__ warning of attack. The cliffs and hills provided elevated __38__ points from which huge areascould be surveyed at the expense of very little physical effort. Even the weather patterns on the savanna __39__ in favor of our hominid ancestors. The usually dryness ofthe plain meant that for most of the year, the available water was concentrated in a relatively few areas, or waterholes as they are now called. Of course, this resulted in concentrations of animals in those same small areas.Thus, the critical task of finding __40__ was greatly simplified.
(A) In contrast to
(B) precluded
(C) delineated
(D) precipitation
(E) advance(F) irreparably (G) dictated (H) exclusively (I) vantage (J) game(K) adjacent (L) conspired (M) volatility (N) In addition to 
31

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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