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9Unit3LanguageinuseBeijingisahugecity.Ittakesanhourtogettherebybus.That’salmostonefifthoftheworld’spopulation.Thatmakesover131.4millionbirthsayear.Languagepractice多位基数词读法threehundredandeighty-ninefourhundredandfifty-seveneighthundredandninety1）101~999的三位数由“百位数＋and+两位数”组成。如：325—threehundredandtwenty-fiveonehundredandtwosixhundredandthirty-five102635389457890三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thousand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-fourhundred,thousand,million,billion等前面有基数词，表示确切数目时，用单数，后直接接复数名词如：threehundredbooksfivethousandstudentssevenmillionstarts表示不确切数目时，这类词后加-s且与of连用如：hundredsofpeoplethousandsofstudentsmillionsofbirdsbillionsoflionsf确切数目与不确切数目的表达：1.Workinpairs.Matchthecountrieswiththeirpopulations.1Chinaa)4,437,0002theUSAb)22,956,0003Australiac)314,791,0004NewZealandd)1,370,537,0002.ReadyouranswerstoActivity1tothewholeclass.Chinahasapopulationof…Nowlistenandcheck.3.Readthechartandanswerthequestions.1Whichcityhadthelargestpopulationin2000?2Whichcity’spopulationwillincreasethemostfrom2000to2025?Tokyohadthelargestpopulationin2000.Mumbai'spopulationwillincreasethemostfrom2000to2025.3Whichcitywillhavealargerincreaseinitspopulation,NewYorkorMexicoCity?4Whichcity/citiesdoyouthinkwillhavethebiggestpopulationproblem?Why?Mexicocity.IthinkMumbaiwillhavethebiggestpopulationproblembecauseitspopulationwillincreasethefastest.不定冠词的用法总结：不定冠词两变体，用a或an都表“一”；可数名词首次提，何人何物不具体；某类人、物任一个，有时还要表“每一”。a和an的选用与巧记冠词a，an两顶帽，单数名词常需要；单词开头发元音，an帽儿任你挑；辅音起首戴a帽，记住规律莫乱套。特指双方均熟悉上文已经提及到世上独一又无二序数词前最高级山河海岛建筑物姓氏复数奏乐器少数形表人一类方位名词须牢记普构专有惯用词试用此诀有效率定冠词的用法总结：下列情况零冠词，名词之前代词限；专有名词不可数，球类学科与三餐；复数名词表泛指，节日月份星期前；颜色语种和国名，称呼习语及头衔。零冠词的基本用法总结：4Completethepassagewitha,anorthewherenecessary.Minais(1)____eighteen-year-oldgirl.Shehasgot(2)____brotherand(3)_____sister.Minais(4)___oldestchildin(5)____family.Shelivesin(6)____verybigcity.Shehas(7)______jobin(8)_____hotel.Shehopesthatonedayshewillhave(9)_____chancetogoto(10)_____college.aanathetheaaaa/5Completethesentenceswiththecorrectformofthewordsinthebox.fewgoodmuchsmall1WebelievetheschoolsinArnwickareverygood,andweareworkingtomakethemeven_______.2Theirflatistoolargefortwopeople.Theywanttofinda_______one.3Annaalwaystalksaboutherideas.Ithinksheneedstolisten_______.4Therearealotofparksinthiscity.Ithinkthereare_______parksinalotofothercities.bettersmallermorefewer6Completethediagramshowingpopulationproblems.Usethewordsintheboxtohelpyou.aircitycountryhospitalincreasepublicservicetrafficwaterProblemsofArnwickProblems:Population___________Peoplearrivein_________thecityincreasesPeoplemovefrom_______thecountrysideEnvironmentalproblemsExample:______________________________________________________HealthproblemsExample:______________________________ProblemsforthegovernmentExamples:___________________________________________________________________________________________________①airpollutionwaterpollutiontoomuchtrafficrubbish③②notenoughhospitalsneedmoreschoolsandbusesneedbetterpublicservicesneedmorepolicetoprotectpeople7Completethepassagewiththewordsinthebox.countrysidepollutionpopulationspacetrafficOurworldisfacingmanyproblems.Twoofthebiggestareincreasingpopulationandpollution.The(1)_____________oftheworldisincreasingquickly.Whyisthishappening?Becausemorebabiesareborneveryyearandpopulationpeoplealsolivelonger.Manypeopleareleavingthe(2)_________toworkinthecities,butthereisnotenough(3)__________forsomanypeople.Anotherhugeproblemfortheworldis(4)__________.Thereissomuch(5)________ontheroadsthatinsomecitiestheairisheavilypolluted.Wemustworkhardertoprotectourworld.countrysidespacepollutiontrafficallovertheworldcloseddowninthefutureittakesnot…anymore8Completethesentenceswiththeexpressionsinthebox.1Growingpopulationisaproblem________________________.2ThepopulationofChinamaygrowmoreslowly.allovertheworldinthefuture3Thesupermarketwhenabiggeroneopenedinthetown.4Usuallyanhourtogettherebybus.5Thetownhadalotofpopulationinthepastbutitisaproblem.ittakesnotanymorecloseddown9Listenandchoosethebestsummary.a)Itischeapertoshareacarthantohaveapersonalcar.b)Peopleinacarclubdonotoftentakebuses,trainsortheunderground.c)TherearenocarclubsintheUS.d)Joiningcarclubsisgoodforyouandforthecity.√10Listenagainandchoosethecorrectanswer.1Joiningacarclubischeaper/moreexpensivethanhavingapersonalcar.2Peopleincarclubspayfor/donotpayforacarwhentheydrive.3Peopleincarclubssometimes/nevertakeabusorrideabike.4Peopleincarclubsprobablyare/arenothealthier.11Workinpairsanddiscussthisquestion.DoyouthinkcarclubswouldbepopularinChina?Why/Whynot?Inmyopinion,carclubs…WorldpopulationandwaterWithmoreandmorepeopleintheworld,moreandmorewaterisused.Infact,wateruseisgrowingmorethantwiceasfastastheworld’spopulation!Asaresult,gettinggood,cleanwaterisbecomingaprobleminmanyplaces.Alotofwaterispollutedandinmanyareaspeoplehavetowalkalongwaytogetcleanfordailyuse.Morethan3.4millionpeopledieeachyearfromdrinkingandwashingwithpollutedwater.Solet’sdoeverythingwecantostopthepol