The amazing success of humans as a (91) is the result of the evolutionary development of our brains which has led, among other things, to tool-using, tool-making, the (92) to solve problems by logical reasoning, thoughtful cooperation, and language. One of the most striking ways in which chimpanzees biologically (93) humans (94) in structure of their brains. The chimpanzee, with the capacity for (95) reasoning, (96) a type of intelligence more like that of humans than (97) any other mammal living today. The brain of the modern chimpanzee is probably not too dissimilar (98) the brain that so many millions of years ago (99) the behavior of the first ape man.
For a long time, the fact that prehistoric people made (100) was considered to be one of the major (101) distinguishing them from other creatures. (102) pointed out earlier, I have watched chimpanzees (103) grass stems in order to use them to probe for termites. It is tree that the chimpanzee does not (104) tools to "a regular and set pattern"—but then, (105) people, before their development of stone tools, undoubtedly poked around (106) sticks, and straws, at which stage it seems (107) , that they made tools to a set pattern either.
It is because of the close (108) in most people’s minds of tools with humans (109) special attention has always been focused upon any animal able to use an object as a tool: but it is important to realize that this ability, on its own, does not necessarily indicate any special intelligence in the creature (110) .

A．means

B．exhibits

C．shows off

D．implies

梅特涅逃跑是1848年欧洲革命中最让人感到滑稽的一幕，当然，这归因于时人所画的那幅著名漫画。这场让曾经是欧洲的焦点和一手缔造了“维也纳体系”的著名人物灰头土脸的革命的爆发有着深刻的社会原因。工业革命的再发展，引起子大多数国家的工业资产阶级对自己所处政治地位的不满，而民族主义、自由主义又在各国呈现出高涨趋势，反动的维也纳封建体系致力于禁锢资本主义发展的企图使封建统治者几乎丧失了与资产阶级合作的可能。这些原因都不及自然原因来得独特：1845—1847年马铃薯病虫害引起的农业歉收和 1847年经济危机引起的工人失业，使得本已动荡的欧洲雪上加霜，革命终于一触即发。
最能准确概括这段话意思的是( )。

A．梅特涅是欧洲的焦点并一手缔造了“维也纳体系”，他的逃跑是1848年欧洲革命中最可笑的一幕

B．让梅特涅灰头土脸的1848年欧洲革命的爆发是有多种多样的社会原因及自然原因的

C．农业歉收及经济危机与其他社会原因相比，在1848年欧洲革命中显得更为独特

D．工业资产阶级的发展，民族主义、自由主义的兴起，维也纳体系对各国资本主义的禁锢构成了1848年欧洲革命爆发的原因