英语四级考试完形填空寒假练习（6）

　　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 ____1____--, they were like newborn children, unable to use this ____2____ -- tool. Yet once language developed, the possibilities for human kinds future ____3____ -- and cultural growth increased.

　　Many linguists believe that evolution is ____4____ -- for our ability to produce and use language. They ____5____ -- that our highly evolved brain provides us ____6____ -- an innate language ability not found in lower ____7____ --. Proponents of this innateness theory say that our ____8____ -- for language is inborn, but that language itself develops gradually, ____9____ -- a function of the growth of the brain during childhood. Therefore there are critical ____10____ -- times for language development.

　　Current ____11____ -- of innateness theory are mixed, however, evidence supporting the existence of some innate abilities is undeniable. ____12____ --, more and more schools are discovering that foreign languages are best taught in ____13____ -- grades. Young children often can learn several languages by being ____14____ -- to them, while adults have a much harder time learning another language once the ____15____ -- of their first language have become firmly fixed.

　　____16____ -- some aspects of language are undeniably innate, language does not develop automatically in a vacuum. Children who have been ____17____ -- from other human beings do not possess language. This demonstrates that ____18____ -- with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language ____19____ -- than any innate capacities. These theorists view language as imitative, learned behavior. ____20____ --, children learn language from their parents by imitating them. Parents gradually shape their childs language skills by positively reinforcing precise imitations and negatively reinforcing imprecise ones.

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

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

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

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

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

　　6.A.for B. from C. of D. with

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

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

　　9.A.as B. just as C. like D. unlike

　　10.A.ideological B. biological C. social D. psychological

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

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

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

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

　　15.A.regulations B. formations C. rules D. constitutions

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

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

　　18.A.exposition B. comparison C. contrast D. interaction

　　19.A.acquisition B. appreciation C. requirement D. alternative

　　20.A.As a result B. After all C. In other words D. Above all