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1、SectionBUnit1TheChangingWorldTopic2Thepopulationindevelopingcountriesisgrowingfaster.numbersinourlivesonehundredandfiftyyuanthousandsofpeopletwopointtwosix(2.26)meterstalltwothousandandeightOlympicGames1,000,000,000onebillion1,000,000onemillion1,000onethousand3.14threepointonefou
2、r100onehundredLook,readandlearnFirst,trytoseparatethenumberingroupsofthreefromrighttoleft.Thenreaditinorderfrombilliontomillionandthousand.Howtoreadnumbers?1,000,000,000billionmillionthousand10000000002Listenandreadthenumbers,payingspecialattentiontotheintonation.Thenreadtheother
3、numberswithyourpartner.1,000,000,000billionmillionthousand543.7fivehundredandforty-threepointseven1562onethousand,fivehundredandsixty-two6004001sixmillion,fourthousandandone7198764502sevenbillion,onehundredandninety-eightmillion,sevenhundredandsixty-fourthousand,fivehundredandtwo
4、973ninehundredandseventy-three3980threethousand,ninehundredandeighty98721ninety-eightthousand,sevenhundredandtwenty-one768540sevenhundredandsixty-eightthousand,fivehundredandforty1,000,000,000billionmillionthousand2346780twomillion,threehundredandforty-sixthousand,sevenhundredand
5、eighty82346580eighty-twomillion,threehundredandforty-sixthousand,fivehundredandeighty405000000fourhundredandfivemillion5555555555fivebillion,fivehundredandfifty-fivemillion,fivehundredandfifty-fivethousand,fivehundredandfifty-five1,000,000,000billonmillionthousand6800808080Thepop
6、ulationisincreasingby90millioneveryyear.=Theworldhasapopulationof7.2billion.Whatalargepopulation!1bListento1aandmatchtheinformation.1.theworld2.China3.India4.theUSAA.321millionB.7.2billionC.1.37billionD.1.31billionMakesimilarconversationsaftertheexample.Example:A.:What’sthepopula
7、tionoftheworld?B:It’sabout7.2billion.1.theworld2.China3.India4.theUSAA.321millionB.7.2billionC.1.37billionD.1.31billion1cRead1aandfillintheblanks.Theworldhasapopulationof7.2billionanditisincreasingby__________everyyear._______hasthelargestpopulation.Ithasalreadyreached__________a
8、ndIndiais_________with1.1billion.Thepopu
