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Therewasarichmother.Shelovedhersonverymuch.Tip:rich富有的AmotherandhersonThesongrewuphappily.Hismotherwashappytoo.Oneday…Igiveyousomecoaltoexchangesometoys.Tips:growup成长exchange交换coaltMum,Iwantsometoys.煤Therewasarichmother.Shelovedhersonverymuch.Tip:rich富有的Mum,Iwantacar.Aftersomedays…Igiveyousome____toexchangeacar.oitletl石油Mum,Iwantsometoys.Tips:growup成长exchange交换Thesongrewuphappily.Hismotherwashappytoo.Oneday…Igiveyousomecoaltoexchangesometoys.coalIwantacar.Somedayslater,…Igiveyousometoexchangeahouse.woodIwantahouse.give…to…Mum,Iwantacar.Aftersomedays…Igiveyousome____toexchangeacar.oilIwantsomemoney.Whenthesonbecameayoungman,hermotherwasold.Igiveyousometoexchangesomemoney.waterTips:young年轻的money钱Iwantahouse.Somedayslater,…Igiveyousometoexchangeahouse.woodNow…Motherispoor.Shehasnothingbutrubbish.Hersondoesn’tcomeback.Sheissad.Tips:poor贫穷的havenothingbut除了…什么都没有Whenthesonbecameayoungman,hermotherwasold.Igiveyousometoexchangesomemoney.waterIwantsomemoney.Tip:young年轻的money钱Tips:young年轻的money钱AmotherandhersonhEeartEar地球thlyUnit7ProtecttheEarthateraniwtreepehometareh地球heEeartwaterWaterisuseful.地球表面大部分都被水所覆盖。Waterisuseful.Weusewaterto…Let’slearn!Inmanyplaces,thereisnotmuchwater.Weshould...savewater.Weshouldnotwastewater.Tip:shouldnot=shouldn’twasteusereWeshouldreusewater.HowtoprotecttheEarth?Let'sfind!SavewaterSaveenergySavetreesDon’tusetoomuchplasticLet’ssay!energyenergycoaloilMostofourenergycomesfromcoalandoil..能量、能源大部分Let’slearn!drivecarsEnergyisuseful.Weuseenergyto…Carsusealotofenergy.There’snotmuchcoaloroilonEarth.Weshouldsaveenergy.Weshouldnotdrivesomuch.HowtoprotecttheEarth?Weshould…Weshouldnot…Readandcomplete水Wateris_________.Weuse______to______________.Thereis___________water.Weshouldnot________water.Weshould________and________it.usefulwatercleanthingsnotmuchwastereusesave能源Energycomesfrom_____and_____.Thereis________coal___oilon_______.Weshould________energy.Weshouldnot_________________.coaloilnotmuchorEarthsavedrivesomuchReadthelasttwopartsquickly.快速阅读后两段，了解大意，找出不懂的词或句！Let’sread!cutdownWeshouldn’tcutdowntoomanytrees.Woodcomesfromtrees.Weusewoodtomake…whitepollution白色污染Weuseplastictomake...plasplasticPracticeinfour.Chooseoneparttostudyandfinishthetasks.四人一组，在课文后两段中选择一段进行自主学习并完成任务（同学们，发挥你们的想象力吧！）Let’sstudy!Savetrees小组合作学习本段，并试着演一演。小伙伴们：可以发挥想象哦！小组合作学习本段并展开辩论。说一说使用塑料的利弊。ActthispartLittledebate小小辩论会Don’tusetoomuchplasticTask1:小组合作学习并试着演一演，可以发挥想象哦！SavetreesWeshouldsaveandplanttrees.Weshouldn’tcutdowntoomanytrees.Treeshelpkeeptheairclean.小小辩论会Hello,everyone!I’mplastic.SomepeoplethinkI’mgood.ButsomeonesaysI’mbadfortheEarth.DoyouthinkI’mgoodorbad?yourIthinkplasticisgood.Ithinkplasticisbad.Weshouldn’tusetoomanyplasticbagsorbottles.Weshouldusepaperbagsandglassbottles.ToomuchplasticisbadfortheEarth.Readthearticlewiththetape.阅读策略：仔细阅读，注意should和shouldnot的用法Let’sread!Let'sretell...isuseful.Becauseweuse…to…Soweshouldn’t…Weshould…Now…Motherispoor.Shehasnothingbutrubbish.Hersondoesn’tcomeback.Sheissad.Howtomakethemotherhappy?Thesoncomesback.MakeupthestoryToprotecttheEarth,weshouldn’t…Weshould…MakeupthestoryToprotecttheEarth,weshouldn’t…Weshould…MakeupthestoryStartfromnow!从现在做起！Startfrommyself!从我做起！1Readthestoryandtrytoretellthestory.2Finishtheexercise(P70).