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Unit1TheChangingWorldTopic2Thepopulationindevelopingcountriesisgrowingfaster.SectionBonehundredandfiftyyuanthousandsofpeople

twopointtwosix(2.26)meterstalltwothousandandeightOlympicGames1,000,000,000onebillion1,000,000onemillion1,000

onethousand3.14threepointonefour100onehundredFirst,trytoseparatethenumberingroupsofthreefromrighttoleft.Thenreaditinorderfrom

billiontomillionandthousand.Howtoreadnumbers?1,000,000,000billionmillionthousand10000000002Listenandreadthenum

bers,payingspecialattentiontotheintonation.Thenreadtheothernumberswithyourpartner.1,000,000,000billionmillionthousand54

3.7fivehundredandforty-threepointseven1562onethousand,fivehundredandsixty-two6004001sixmillion,fourtho

usandandone7198764502sevenbillion,onehundredandninety-eightmillion,sevenhundredandsixty-fourthousand,fivehundredandtwo973ninehun

dredandseventy-three3980threethousand,ninehundredandeighty98721ninety-eightthousand,sevenhundredandtwenty-one768540sevenhundredandsixty-ei

ghtthousand,fivehundredandforty1,000,000,000billionmillionthousand2346780twomillion,threehundredandforty-sixth

ousand,sevenhundredandeighty82346580eighty-twomillion,threehundredandforty-sixthousand,fivehundredandeighty4050000

00fourhundredandfivemillion5555555555fivebillion,fivehundredandfifty-fivemillion,fivehundredandfifty-fivethousand,fiv

ehundredandfifty-five1,000,000,000billonmillionthousand6800808080Thepopulationisincreasingby80millioneveryyear.=

Theworldhasapopulationof6.8billion.Whatalargepopulation!1bListento1aandmatchtheinformation.1.theworld2.China3.India4.t

heUSAA.309millionB.6.8billionC.1.3billionD.1.1billionMakesimilarconversationsaftertheexample.Example:A.:What’sthepopulationoftheworld?B:It’sabou

t6.8billion.1.theworld2.China3.India4.theUSAA.309millionB.6.8billionC.1.3billionD.1.1billion1cRead1aandfillinthebl

anks.Theworldhasapopulationof6.8billionanditisincreasingby__________everyyear._______hasthelargestpopulation.Ithasalreadyreached_____

_____andIndiais_________with1.1billion.Thepopulationindevelopingcountriesis______andisgrowing________

thanthatindevelopedcountries.Luckily,ourcountryhascarriedoutthe___________policytocontrolthepopulation.80mi

llionChina1.3billionsecondlargerfasterone-childThesupermarketisverycrowded.Soitis.So+主语+be/情态动词/助动词Lucydanc

esverywell.Shehascleanedtheroom.Soshedoes.Soshehas.Soitis.确实如此。A：Whatalargepopulation!Theworld…6.8billion.…80millioneveryyear.B：Whichcountry…?A：China

…reach…,andIndia…with….B：…theUSA?A：309million.B：Itshows…developingcountries…developedcountries.A：…isgrowingfaster…B：Soitis.Thepopulationproblem…dev

elopingcountriesA：China…carryout…controlthepopulation.3Workingroupsanddiscussthepopulationoftheworld.Thefollowingchartandquestionsmayhelpyou

.1.Whichofthese5countrieshasthelargest/smallestpopulation?What’sthepopulationofit?2.Whatcanyoutellfromthepopulationindevelopingcountriesandindevel

opedcountries?3.Whatproblemsdoesthelargepopulationcause?4.Whatmeasuresdoyouthinkshouldbetakentocontrolt

hepopulation?Chinahasthelargestpopulation.ThepopulationofChinais1.3billion.Canadahasthesmallestpopulation.ThepopulationofCanadais34million.T

hepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Thelargepopulationmaycauselesslivingspace,morepollutionandsoon.Choo

sethebestanswer.1.—______isthepopulationofRussia?—143million.A.HowmuchB.HowmanyC.WhatD.How2.Thereare______stu

dentsinourschool.A.threethousandsB.threethousandsofC.threethousandofD.threethousand3.—Jennyalwayshelpsothers.—______.A.SoissheB.

SosheisC.SodoessheD.Soshedoes4.ThepopulationofChinais______thanthatofJapan.A.largerB.moreC.fewerD.lessCDDA1.

ReadnumbersinEnglish.2.Talkaboutpopulationproblems.1.Somewords:population,billion,increase,reach,luckily,policy,Russia,measure2.Somephrases:inc

reaseby,developingcountries,developedcountries,carryout,theone-childpolicy3.Somesentences:Whatalargepopulation!Theworldhasapopulation

of6.8billion.Soitis.Homeworke.g.Thepopulationofthiscityisnearly300000.这个城市的人口将近三十万。e.g.80%ofthepopulationi

nChinaarefarmers.中国百分之八十的人口是农民。e.g.ThepopulationofChinaisverylarge.中国人口众多。Thepopulationinthisareaisbecomin

gsmallerandsmaller.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。i

ncreaseby+数字/倍数/百分数增加了……e.g.Thepriceofthehousehasincreasedbythreetimes.increaseto+数字增加到……e.g.Thepriceofthehousehasincreasedto500000.25

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