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Unit1TheChangingWorldTopic2Thepopulationindevelopingcountriesisgrowingfaster.SectionBonehundredandfiftyyuanthousandsofpeopletwopoint

twosix(2.26)meterstalltwothousandandeightOlympicGames1,000,000,000onebillion1,000,000onemillion1,000onethousand3.14threep

ointonefour100onehundredFirst,trytoseparatethenumberingroupsofthreefromrighttoleft.Thenreaditinorderfrombilli

ontomillionandthousand.Howtoreadnumbers?1,000,000,000billionmillionthousand10000000002Listenandreadthenumbers,payingspecialattent

iontotheintonation.Thenreadtheothernumberswithyourpartner.1,000,000,000billionmillionthousand543.7fivehundredandfor

ty-threepointseven1562onethousand,fivehundredandsixty-two6004001sixmillion,fourthousandandone7198764502sevenbillion,onehundredandninety-eight

million,sevenhundredandsixty-fourthousand,fivehundredandtwo973ninehundredandseventy-three3980threethousand,ninehundredandeighty

98721ninety-eightthousand,sevenhundredandtwenty-one768540sevenhundredandsixty-eightthousand,fivehundredandfort

y1,000,000,000billionmillionthousand2346780twomillion,threehundredandforty-sixthousand,sevenhundredandeighty8

2346580eighty-twomillion,threehundredandforty-sixthousand,fivehundredandeighty405000000fourhundredandfivemillion555

5555555fivebillion,fivehundredandfifty-fivemillion,fivehundredandfifty-fivethousand,fivehundredandfifty-five1,0

00,000,000billonmillionthousand6800808080Thepopulationisincreasingby80millioneveryyear.=Theworldhasapopulationof6.8billion

.Whatalargepopulation!1bListento1aandmatchtheinformation.1.theworld2.China3.India4.theUSAA.309millionB.6.8billionC.1.3billionD.1.1bi

llionMakesimilarconversationsaftertheexample.Example:A.:What’sthepopulationoftheworld?B:It’sabout6.8billion.1.theworld2.China3.India4.the

USAA.309millionB.6.8billionC.1.3billionD.1.1billion1cRead1aandfillintheblanks.Theworldhasapopulationof6.8billionanditisi

ncreasingby__________everyyear._______hasthelargestpopulation.Ithasalreadyreached__________andIndiais_________wit

h1.1billion.Thepopulationindevelopingcountriesis______andisgrowing________thanthatindevelopedcountries

.Luckily,ourcountryhascarriedoutthe___________policytocontrolthepopulation.80millionChina1.3billionsecondlargerfasterone-childThesupermarketisverycr

owded.Soitis.So+主语+be/情态动词/助动词Lucydancesverywell.Shehascleanedtheroom.Soshedoes.Soshehas.Soitis.确实如此。A：W

hatalargepopulation!Theworld…6.8billion.…80millioneveryyear.B：Whichcountry…?A：China…reach…,andIndia…with….B：…theUSA?A：309million.B：Itshows…developing

countries…developedcountries.A：…isgrowingfaster…B：Soitis.Thepopulationproblem…developingcountriesA：China

…carryout…controlthepopulation.3Workingroupsanddiscussthepopulationoftheworld.Thefollowingchartandques

tionsmayhelpyou.1.Whichofthese5countrieshasthelargest/smallestpopulation?What’sthepopulationofit?2.Whatcanyoutellfromth

epopulationindevelopingcountriesandindevelopedcountries?3.Whatproblemsdoesthelargepopulationcause?4.Whatmeasuresdoyouthinkshoul

dbetakentocontrolthepopulation?Chinahasthelargestpopulation.ThepopulationofChinais1.3billion.Canadahasthesmallestpopulation.

ThepopulationofCanadais34million.Thepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Thelar

gepopulationmaycauselesslivingspace,morepollutionandsoon.Choosethebestanswer.1.—______isthepopulatio

nofRussia?—143million.A.HowmuchB.HowmanyC.WhatD.How2.Thereare______studentsinourschool.A.threethousandsB.threethousandsofC.threethousandofD.threethou

sand3.—Jennyalwayshelpsothers.—______.A.SoissheB.SosheisC.SodoessheD.Soshedoes4.ThepopulationofChinais_____

_thanthatofJapan.A.largerB.moreC.fewerD.lessCDDA1.ReadnumbersinEnglish.2.Talkaboutpopulationproblems.1.Somewords:population,billion,i

ncrease,reach,luckily,policy,Russia,measure2.Somephrases:increaseby,developingcountries,developedcount

ries,carryout,theone-childpolicy3.Somesentences:Whatalargepopulation!Theworldhasapopulationof6.8billion.Soitis.Homeworke.g.Thepopula

tionofthiscityisnearly300000.这个城市的人口将近三十万。e.g.80%ofthepopulationinChinaarefarmers.中国百分之八十的人口是农民。e.g.ThepopulationofChinaisverylarge.中国人口众多。Th

epopulationinthisareaisbecomingsmallerandsmaller.这个地区的人口越来越少。强调人口的具体分布或构成(作复数）BACKpopulation集合名词某地整体人口的数量(

作单数）通常用large/big/small来修饰。increaseby+数字/倍数/百分数增加了……e.g.Thepriceofthehousehasincreasedbythreetimes.increaseto+数字增加到……e.g.The

priceofthehousehasincreasedto500000.250250250250250250500BACK