2. 外语
  3. From childhood to old age, we all use language as a means of broadcasting our knowledge of ourselves and the world about us. Whe

From childhood to old age, we all use language as a means of broadcasting our knowledge of ourselves and the world about us. Whe

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问题     From childhood to old age, we all use language as a means of broadcasting our knowledge of ourselves and the world about us. When human first (47)______, they were like newborn children, unable to use this (48)______ tool. Yet once language developed, the possibilities for humankind’s future attainments and cultural growth increased.
    Many linguists believe that evolution is (49)______ for our ability to produce and use language. They (50)______ that our highly evolved brain provides us with innate language ability not found in lower organisms. Proponents of this innateness(先天) theory say that our (51)______ for language is inborn, but that language itself develops gradually as a function of the growth of the brain during childhood. Therefore there are critical biological times for language development.
    Current (52)______ of innateness theory are mixed, however, evidence supporting the existence of some innate abilities is undeniable. Indeed, more and more schools are discovering that foreign languages are best taught in the lower grades. Young children often can learn several languages by being (53)______ to them, while adults have a much harder time learning another language once the rules of their first language have become firmly fixed.
    Although some aspects of language are undeniably innate, language does not develop automatically in a vacuum. Children who have been (54)______ from other human beings do not possess language. This demonstrates that (55)______ with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language (56)______ than any innate capacities. These theories view language as imitative, learned behavior. In other words, children learn language from their parents by imitating them. Parents gradually shape their child’s language skills by positively reinforcing precise imitations and negatively reinforcing imprecise ones.

                 Word Bank:
A. appropriate                I. interaction
B. evolved                    J. contrast
C. isolated                   K. exposed
D. involved                   L. valuable
E. acquisition                M. inform
F. claim                      N. responsible
G. reviews                    O. potential
H. generate

选项
答案K
解析 从语法结构看,此处为被动结构,缺少动词的过去分词形式,且动词与介词to搭配；从语义看,空格所在句子的意思是：通过接触多种语言,孩子们可以学会好几种语言。因此选择exposed。be exposed to意为“接触到”,是固定搭配。选择中另一词involved后接介词in 构成be involved in搭配,意为“参与,涉及,包括”,不符合句意。
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