2011年12月英语四级全真预测试卷及答案(2)-2

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1、最牛英语口语培训模式：躺在家里练口语，全程外教一对一，三个月畅谈无阻！洛基英语，免费体验全部在线-对-课程：www.cnglishvip.com/wcnkxd.htm(报名网址)PartWReadingComprehension(ReadinginDepth)(25minutes)SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfoll

2、owingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Questions47to56arebasedonthefollowi

3、ngpassage・ThecomparativelytreelessplainsofNorthAfricahavesufferedaprogressivedryingup,both47andman-made,buttheregionwas48sorichinfertilesoilthatthedistrictwenowknowastheLibyanDesertwas,intheolddays,partofthegranary(粮仓)oftheRomanEmpire,andthecentreoftheSahara49abusytradingpopulation

4、foralongperiod.Thatwaswhentherewere50inplentyandthefieldswerethetraditional“fieldsofthewoods”一clearingsintheforest一andthereforealwaystree51•Itisthetreesthatliftthewaterandsend52intotheairsothatitmayfallasdeworrainfurtheron.Treesreducethespeedofthewind,andprovideshelterandshade;ther

5、oots53mineralsinthesoilandthesearecarriedtotheleaveswhich,whentheyhavefulfilledtheirfunction,returntotheearth,givingthesoilthecombinationofmineralsthatplantsrequire.ButthroughtheagesAfricahasbeen54.Successiveinvadershavefelledtheforesttoprovidegrazinglandsfortheirflocksandherds.Wit

6、htheremovaloftheessentialtreecover,thewater55wasbroken,theearthbecamefeverishandsick,andincourseoftimewasunabletosupportthosewhohadbrokenthe56oflifebyremovingtheearth'sgreenmantle—thetrees.A)moistureB)cycleC)waterD)rhythmE)containF)trapG)onceH)surroundedI)fedJ)exploitedK)socialL)na

7、turalM)forestN)usuallyO)treesSectionBDirections:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheet2withasinglelinet

8、hroughthecentre.PassageOne