开放英语4Unit19-Unit23练习题

Unit19UrbanandRuralWorlds城镇与乡村文章学练1Mega-citiesIn1950,1D.2A.3C.4A.5B.文章学练2ACaseStudy:DesertificationaroundtheGobiDesert1D.2A.3B.4A.5D.语法&功能学练Ⅰ.填空补充完成句子。1.Therearenow11cities（which）（house）over11millionpeopleeach.2.Theworld’surbanpopulation,（which）（is）（increasing）atfourtimestherateofruralpopulations,willdoubleintheperiod1990-2025.3.Thisgrowth,（which）（adds）around60millionpeopleperyeartocitypopulations,willbemainlyinSoutheastAsiaandAfrica.4.Thisischangeonascaleneverbeforeexperienced,（which）（brings）withitconsiderablechallengesandopportunities.5.Improvedhealthbringspopulationgrowth,（which）（causes）peopletomoveoutofruralareas.6.Suchchangescanalterthesocialstructure,（which）（leads）peopletomove.7.Civilwarorregionalconflictsalsocausedisruption,（which）（drives）peopleoutofruralareas.Ⅱ仿照示例，用所给的词语造句。8.oneof/drysummers/we/know.答案：It’soneofthedriestsummerswehaveeverknown.9.coldwinter/we/have.答案：It’sthecoldestwinterwe’veeverhad.10.wetday/I/experience.答案：It’sthewettestdayI’veeverexperienced.11.oneof/hotweekends/I/know.答案：It’soneofthehottestweekendsI’veeverknown.12.warmautumn/we/have.答案：It’sthewarmestautumnwe’veeverhad.13.oneof/beautifulsummers/we/have.答案：It’soneofthemostbeautifulsummerswe’veeverhad.14.windynight/I/experience答案：It’sthewindiestnightI’veeverexperienced.15.oneof/coolsprings/we/know.答案：It’soneofthecoolestspringswe’veeverknown.Ⅲ.选择最佳答案填空。16.Sixtymillionpeoplewho（D：live）inruralareasaremovingtocitieseveryyear.17.Thisgrowth,（B：whichishappening）mainlyinSoutheastAsiaandAfrica,hasdramaticconsequences.18.Civilwarorregionalconflictsalsocausedisruption,（C：driving）peopleoutofruralareas.19.Therearemanycities（A：expanding）veryfast.20.Suchchangescanalterthesocialstructure,（D：leading）peopletomove.21.It’soneofthebest（A：concerts）Ihaveeverbeento.22.It’sthebestfilmI’ve（C：ever）seen.23.It’s（B：thebest）novelI’veeverread.24.It’s（D：oneof）thedriestsummerswehaveeverknown.25.It’soneofthecoolestspringswe（C：haveeverknown）.Ⅳ.选择最佳答案将文章补充完整。Theworld’surbanpopulation,1B.2C.3A.4C.5B.6D.7B.8C.9A.10D.Unit20TheConsumerSocietyortheWastefulSociety消费还是浪费文章学练1GlobalFood1C.2A.3D.4D.5B.文章学练2WhataWaste!1D.2B.3C.4B.5A.语法&功能学练Ⅰ、填空补充完成第二个句子，使其与第一个句子意思一致。1.Alotoffood（bought）nowadaysisconveniencefood.2.Theenormousamountofwaste（produced）byfast-foodchainsisabigproblem.3.People（employed）byfast-foodchainsareoftenpaidalowsalary.4.Manyofusregularlyeatfood（cooked）inamicrowaveoven.5.Itisbecominglesscommonforpeopletoeatfreshfood（prepared）athome.6.Somemeals（offered）byMcDonald’sarelocalvariations.7.Meals（sold）(tosell)bysupermarketsareoftenquitecheap.8.Meals（cooked）(tocook)inmicrowaveovensarequickandconvenient.9.Conveniencemeals（eaten）(toeat)veryfrequentlywouldmakeyoufat.10.Themeals（produced）(toproduce)byfastfoodchainsarenotverygoodforyou.11.People（employed）(toemploy)byfast-foodchainsareoftenyoung.12.Food（bought）(tobuy)fromsupermarketsisusuallyready-made.Ⅱ、填空补充完成第二个句子，使其与第一个句子意思一致。13.Fast-foodrestaurants（can’tusuallybefound）insmallvillages.14.Alotoftime（canbesaved）withconveniencefood.15.Afranchise（canbebought）fromafast-foodchain.16.Children’sbirthdayparties（canbeheld）inMcDonald’s.17.Beer（can’tbebought）inafast-foodchain.18.Localfood（canbeadapted）tomakeit‘global’.19.Wasteelectricalgoods（mustbedisposed）ofsafely.20.Fridges（mustnotbedumped）inthestreet.21.Theexportofwasteelectricalgoodstoothercountries（mustbebanned）.22.Theproblem（mustbesolved）.getlookgoesbuyscookshavetakemakewantbeorderseat23.Whenparents（take）theirchildrenouttoeat,thechildrenusually（want）toeatfastfood.24.Inevercookready-mademealsifI（have）timetocook.25.Whenshe（goes）shoppingforclothes,sherarely（buys）designerclothes.26.Ifyou（eat）toomuchjunkfood,yourskindoesnot（look）verygood.27.IfI（am）inahurry,Isometimes（make）asandwichforlunch.28.Whenmymum’snottoobusy,she（cooks）myfavouritefood.29.Ifhe’stootiredtocook,hesometimes（orders）apizza.30.Whenwegotothestreetmarket,wealways（get）organicvegetables.Ⅳ、选择最佳答案将文章补充完整。Dealingwithwasteisahugeglobalproblem..1B.2A.3D.4C.5D.6D.7A.8C.9B.10B.Unit21LookingAftertheWorld关爱地球文章学练1GreenpeaceLaunchesRenewableEnergyGlobalTour1B.2D.3A.4C.5D.文章学练2CETACEANS:FACTFILE1B.2D.3A.4D.5B.语法&功能学练Ⅰ、判断下列句子表示建议还是指令，并选择最佳答案。1.Youknow,youmustdosomethingaboutyourcartoday.It’sdangerous.B.instructions2.Youmusttrythatgarage.They’reverygood.A.recommendations3.Well,youmustcomeroundtomorrowtotalkaboutthesupplier.B.instructions4.Well,ifyou’vegotaproblem,youmustgoroundtothatsupplier.Theywillsortitout.A.recommendationsⅡ、填空补充完成第二个句子，使其与第一个句子意思一致。5.Unless（thegovernmentbanstrafficinthecentreofthecity）,congestionwillgetworse.6.Unless（wepromoterenewableenergy）,theEarth’snaturalresourceswillbeusedupsoon.7.Unless（thedumpingofwasteelectricalgoodsisstopped）,people’shealthwillsuffer.8.Unless（moregreencarsareproduced）,airpollutionwillincrease.9.Riverswillbelesssafeunless（factoriesarebannedfrompollutingthem）.Ⅲ、仿照示例，填空补充完成第二个句子。10.（Peoplesaythat）dolphinsareveryintelligent.11.（Scientistsreportthat）dolphinscommunicatewitheachotherbylittlenoises.12.（Peopleknowthat）dolphinscanhelpdrowningfishermen.13.（Fishermenunderstandthat）dolphinsaretheirfrie