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1、Practice3proofreadingMostpeopleseemtoneedabouteighthours'sleepaday,(1)curiousanddisturbingthingsbegintohappenwhen(1)(2)theratioisinduced.Thefactthatsleepis(2)(3)essentialtolifehasknownforhundredsofyears.(3)(4)Apsysiologistforthepastcenturydemonstrate
2、dthat(4)(5)puppieswilldieifkeptawakeformorethanfive(5)(6)days.Morerecentexperiments,carriedonpeople,(6)(7)showthatsleepdeprivationproducesprofoundly(7)(8)psychologicaldisturbancesincludingdelusions,(8)(9)orientation,andastateofpanicordepression.(9)(1
3、0)Whydoweneedsleep?Thisiseasyenoughto(10)(11)saythatourcells,but,specifically,thecells(11)(12)ofourbrain,needrestinginordertorecover(12)(13)fromthestressandstrainsofthewakingday,but(13)(14)`rest'isatermthatremainssomebasicquestions(14)(15)unanswered.
4、Musclecellsarejustasmuchatrest(15)(16)wearelollinginabigarmchairwatchingtelevision(16)(17)aswhenwearefastasleepinbed,dreamingourtrue(17)(18)loveorthebullyingbossattheoffice.Thinking(18)(19)ofthevividimpressionyouprobablydetainofafew(19)(20)recentdrea
5、ms,andyouwillbefairlysatisfiedthat(20)braincellscanbejustasactiveduringsleepastheyarewhenwesitattheofficedesk.Whilemorepeoplethaneverbeforearelearningforeignlanguagesinpublicandprivateinstitutions,therearethreestrikingsourcesofinefficiencyinmoderntea
6、ching.(1)First,languageprovidesameansofsayinganddoing(1)(2)things,teachingisgenerallybeingdivorcedfrom-(2)(3)theusewemakeoflanguage.Weteachforanunapplied(3)(4)system,ratherthanteachstudentsdirectlytodo(4)(5)thingsthattheyneedtodothroughlanguage.Secon
7、d,(5)(6)languageisasocialtoolusedbythinkingofsocial(6)(7)individuals.Henceweteachstudentstodoandsay(7)(8)thingswithlanguagewhichisfundamentally(8)(9)significanttothemaspersons,andconsequently(9)(10)theysaythesethingsformerlyandimpersonally.(10)(11)At
8、hirdgreatsourceofinefficacyisduetoan(11)(12)efforttoteachallthestudentsinagroupat(12)(13)thesamerate.Weacknowledgethatthisisunfair(13)(14)tothecapablestudent,butweprobablydon'tcatch(14)(15)theunfairnesstothebadstudent,who'soften(15)(16)takingasbeingu
