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教学准备1.教学目标(一)知识与技能1.Tolearnthefollowingwordsandexpressions.bottom,coal,public,ugly,cost,advantage,method,cruel,harmful,afford.2.TounderstandthepasageonPage99.(二)过程和方法3.Togetageneralknowledgeofpollutionbyreadingandrole-play.4.Toknowabouthowtoreducepollutionthroughdiscussion.(三)情感态度和价值观5.Afterlearningthispart,everystudentwillbeawareoftheserioussituationofpullutionanddeterminedtotakeactiontoprotectourearthfronnowon.2.教学重点/难点一、教学重点1.Howtousethefollowingwordsandexpressions:cost,advantage,harmful,afford,usedto,playapartin…2.tounderstandthepassageonPage99.二、教学难点1.Howtousethefollowingwordsandexpressions:cost,advantage,harmful,afford,usedto,playapartin…2.tounderstandthepassageonPage99.3.教学用具4.标签教学过程1、课堂导入Step1Lead-in1)Showsomepicturesaboutpollutionandaskstudentstodiscusswhat’sthedangerofeachkindofpollution.2)Herearesomewordsarerelatedtodifferentkindsofpollution.Writethemintheboxbelow,andyoucanaddmorewords.loudmusic,littering,buildinghouses,cars,ships,mobilephones,rubbish,factories,planes,smoking.3)Role-playthefollowingconversationandmakeyourownconversationsaboutthekindsofpollutionabove.A:Theriverwasdirty.Eventhebottomoftheriverisfullofrubbish.[来源:学*科*网]B:Butitusedtobesoclean.A:Yes,butpeoplearelitteringintheriver.B:Everyoneinthetownshouldplayapartincleaningitup.2、课堂讲授Step2.Reading1)Fast-readingNowturntopage99andreadthepagequicklytofindanswerstothesheet.2)careful-readingReadthepassageagainandfillinblanks.so,although,ifbut,when①Manypeopledonotrealizetheyarekillingawholeshark___________theyenjoyabowlofshark’sfinsoup.②Sharksareatthetopofthefoodchain,_____________iftheirnumbersdrop,theocean’secosystemwillbeindanger.③Manythinkthatsharksaretoostrongtobeendangered,___________theyarewrong.④_______________therearenoscienfiticstudiestosupportthis,alotofpeoplebelievethatshark’sfinsaregoodforhealth.⑤Sharksmaydisappearoneday__________wedonotdosomethingtostopthesaleofshark’sfins.Possibleanswers:when,so,but,although,if3)Studyingusefulwordsandexpressions.①costv价钱为，花费n.价钱，代价；花费，费用Thecostofaloafofbreadhasincreasedfive-fold..一条面包的价钱增长了4倍。Badgesarealsoavailableatacostof£2.50.徽章也有卖的，2.5英镑一枚。It'sgoingtocostmeover$100,000tobuynewtrucks.买几辆新卡车将花掉我10万多美元。②harmfuladj.对…有害的；能造成损害的；不利；不良Smokingisharmfultoourhealth.吸烟对人类的健康有害。③usedtodo过去一向，过去时常，过去曾（而现在不再）做Whousedtodoyourlaundry?谁过去一直为你洗衣服？Sheusedtowashdishesinarestaurant.她曾经在餐馆里洗过盘子。④affordvt.买得起；担负得起；提供；给予Wecouldn'taffordtobuyanewcar.我们买不起新的车。Wecan'taffordtowait.我们等不起。Myparentscan'tevenaffordanewrefrigerator.我父母甚至买不起一台新冰箱。⑤playapartin扮演某角色;与…有关，对…有影响I'dliketoplayapartintheirdiscussion.我愿意参与他们的讨论。Educationisplayingabigpartinenvironmentalprotection.教育在环境保护中起着很大作用。HeplayedapartinhisfavoriteTVshow.他在他最喜欢的电视节目中扮演了一个角色。课堂小结Step5.SummarizeLookbackonwhatwehavelearned.1.Howtoprotectenvironment.2.Usefullanguages:beharmfulto,atthetopof,atthebottomof.Solveproblems…2、作业布置Homework:makeaconversationwithyourparnteraboutwhatyoucandotoreducepollution.课后习题Step3ExercisesTranslatethefollowingphrases:1.对…有害2.买得起…..3.在……中起作用4.过去常常5.解决问题6.起作用7.听说8.在……顶部9.在……底部10.切下，割下Step4ActivitiesInyourgroupmakealistofthingspeoplecandotohelptheenvironment.板书