英语人教版九年级全册Unit 13 Section A.ppt

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1、Unit13We’retryingtosavetheearth第一课时(SectionA)情境引入Leading-inLookatthefollowingpicturesnoisepollutionairpollutionwaterpollutionRole-playthefollowingconversationandmakeyourownconversationsaboutthekindsofpollutionabove.A:Theriverwasdirty.Eventhebottomoftheriveris

2、fullofrubbish.B:Butitusedtobesoclean.A:Yes,butpeoplearelitteringintheriver.B:Everyoneinthetownshouldplayapartincleaningitup.活动探究Fast-readingNowturntopage99andreadthepagequicklytofindanswerstothesheet.QuestionsAnswersWhereshark’sfinsoupispopularNumbersofsharks

3、caughtandtradedeveryyearHowmuchthenumbersofsomekindsofsharkshavefalleninthelast20-30years.TwoenvironmentgroupswhichareagainstfinningPossibleanswers:SouthernChina70millionover90percentWildAidandtheWWFcareful-readingRaedthepassageagainandfillinblanks.Usingthefo

4、llowingwordsso,although,ifbut,when①Manypeopledonotrealizetheyarekillingawholeshark______theyenjoyabowlofshark’sfinsoup.②Sharksareatthetopofthefoodchain,____iftheirnumbersdrop,theocean’secosystemwillbeindanger.sowhen③Manythinkthatsharksaretoostrongtobeendanger

5、ed,____theyarewrong.④__________therearenoscienfiticstudiestosupportthis,alotofpeoplebelievethatshark’sfinsaregoodforhealth.⑤Sharksmaydisappearoneday____wedonotdosomethingtostopthesaleofshark’sfins.butAlthoughif延伸拓展Studyingusefulwordsandexpressions.①costv价钱为，花

6、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。③usedt

7、odo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

8、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。随堂练习T