Ⅱ。完形填空。從A、B、C、D四個選項中，選擇一個正確答案，并填在答題紙相應(yīng)的位置上。錯選、多選或未選均無分。(本大題共1 5小題，每小題1分，共15分)

　　Fill in each blank in the passage with the most likely answer. (15 points)

　　From childhood to old age， we all use language as a means of broadening our knowledge of ourselves and the world about us. When humans first 16 ， they were like newborn children， unable to use this 17 tool. Yet once language developed， the possibilities for human kinds future 18 and cultural growth increased.

　　Many linguists (語言學(xué)家) believe that evolution is 19 for our ability to produce and use language. They 20 that our highly evolved brain provides us 21 an innate language ability not found in lower 22 . Proponents (建議者) of this innateness theory say that our 23 for language is inborn， but that language itself develops gradually， 24 a function of the growth of the brain during childhood. Therefore there are critical biological times for language development.

　　Current 25 of innateness theory are mixed， however， evidence supporting the existence of some innate abilities is undeniable. 26 ， more and more schools are discovering that foreign languages are best taught in 27 grades. Young children often can learn several languages by being 28 . to them， while adults have a much harder time learning another language once the rules of their first language have become firmly fixed.

　　29 some aspects of language are undeniably innate， language does not develop automatically in a vacuum. Children who have been 30 from other human beings do not possess language. This demonstrates that interaction with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language acquisition than any innate capacities. These theorists 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.

　　16.A. generated B. evolved C. born D. originated

　　17.A. valuable B. appropriate C. convenient D. favorite

　　18.A. attainments B. feasibility C. entertainments D. evolution

　　19.A. essential B. available C. reliable D. responsible

　　20.A. confirm B. inform C. claim D. convince

　　21.A. for B. from C. of D. with

　　22.A. organizations B. organisms C. humans D. children

　　23.A. potential B. performance C. preference D. passion

　　24.A. as B. just as C. like D. unlike

　　25. A reviews B. reference C. reaction D. recommendation

　　26.A. In a word B. In a sense C. Indeed D. In other words

　　27.A. various B. different C. the higher D. the lower

　　28.A. revealed B. exposed C. engaged D. involved

　　29.A. Although B. Whether C. Since D. When

　　30.A. distinguished B. different C. protected D. isolated

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