大学英语四级模拟题三.doc

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1、大学英语四级模拟题三一二三四五六试卷总得分核查人PartOneReadingComprehension(2’×10=20’)Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).Youshoulddecideonthebestchoiceandmarkthecorresponding

2、letterontheAnswerSheetwithasinglelinethroughthecentre.PassageOneScientistsaretryingtomakethedesertsintogoodlandagain.Theywanttobringwatertothedesertssothatpeoplecanliveandgrowfood.Evenso,moreandmoreoftheearthisbecomingdesertallthetime.Why?Scientiststhinkthatpeoplemake

3、deserts.Peoplearedoingbadthingstotheearth.Somepeopleontheearthdonotgetverymuchrain.Yet,theystilldonotbecomedeserts.Thisisbecausetherearesomesmallgreenplantsgrowingthere.Plantshelpkeepwaterintheearth.Plantsdonotletthewindblowthedirtaway.Withoutplants,thelandcanbecomead

4、esertmuchmoreeasily.Amandecidestomakeafarminaverydryplace.Hedigsintheearthandtakesawaythegrassandplantsthatarealreadygrowingonthedryland.Hemakesafarm.Heputsplantsinrows.Thesunisveryhot.Itmakesthelandevendrier.Whentheraincomes,itrunsbetweentherowofplants.Itwashesthegoo

5、ddirtaway.Whenthewindcomes,itblowsbetweentherowsofplants.Itblowsthegooddirtaway.Soonthelandisnotgoodenoughforafarmanymore.Themanletshisanimalseatalltheplantsonit.Nowthelanddoesnothaveanyplantsonit.Thesunandwinddrythelandandallofthegooddirtaway.Nowthelandisadesert.1.Ad

6、esertisprobably_____________.A.grassyB.wetC.treelessD.muddy2.Landisbecomingdesertbecauseoflackof_____________.A.rainB.peopleC.windD.plants3.WhichofthefollowingisNOTthereasonwhysmallgreenplantsareveryimportanttodryplaces?A.Theykeeptheearthfrombecomingevendrier.B.Theydo

7、notletwindblowtheearthaway.C.Theyaddcolortothedryplaces.D.Theyholdwater.4.Itcanbeinferredfromthepassagethat_____________.A.itisbadtoplantinrowsinadryplaceB.itisbettertoraiseanimalsondrylandthantomakeafarmC.itisbadtomakeafarminadryplace,butitisgoodtoraiseanimalsthereD.

8、alllandsthatdon’tgetverymuchrainaredeserts5.What’sthewriter’spurposeingivinganexampleoftheman?A.Tocriticizehim.B.Totellanint