SectionA(3a-3b)Unit13We’retryingtosavetheearth! 学习目标Keywords&phrases:shark,fin,cruel,harmful,beharmfulto,atthetopof,chain,thefoodchain,ecosystem,industry,law,scientific.Keysentences:1.Butdoyourealizethatyouarekillngawholesharkeachtimeyouenjoyabowlofsharkfinsoup?2.Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.Tohavetheawarenessofprotectingsharksandrespectingnature. SouthChinatiger华南虎CrestedIbis朱鹮Let’slookatpicturesofendangeredanimalsinourcountry.adj.濒危的；濒临灭绝的Warming-upPanda大熊猫 BrownEared-pheasant褐马鸡GoldenMonkey金丝猴Chiru藏羚羊Doyouknowanythingaboutthem? FreetalkWhatdoyouknowaboutsharks?Doyouthinksharksareendangered?Why?Whatdoyouthinkmighthavecausedafallinthenumberofsharks? Let'swatchavideo! Pre-readingshark/ʃɑ:(r)k/n.鲨鱼fins/fInz/n.（鱼）鳍newwords&expressionsLet'sread chain[tʃeɪn]n.链子；链条cruel[kru:əl]adj.残酷的；残忍的newwords&expressionsLet'sread newwords&expressionsLet'sreadthefoodchain[tʃeɪn]食物链atthetopof在……顶部或顶端atthetopofthefoodchain ecosystem[ˈi:kəʊˌsɪstəm]n.生态系统WildAid[ˈwaɪldeɪd]野生救援协会（美国）WWF(WorldWideFundforNature)世界自然基金会newwords&expressionsLet'sread industry[ˈɪndəstri]n.工业；行业science[ˈsaɪəns]n.科学scientific[ˌsaɪənˈtɪfɪk]adj.科学的；科学上的scientificstudies科学研究newwords&expressionsLet'sread harmful[ˈhɑ:(r)mfl]adj.有害的beharmfulto对……有害e.g.Smokingisharmfultoourhealth.newwords&expressionsLet'sread What’shappeningtosharks? thesharkiscaught(catch)bypeople.First,thefinsarecut(cut)offbypeople.Next,切除 thesharkfinsarecooked(cook)intothesharkfinsoupbypeople.鱼翅羹Then,thesharkwithoutfinsisthrown(throw)backintotheoceanbypeople.Finally,扔回到…... Whatwillhappentotheshark?Whatshouldwedo? While-readingSavetheSharks!Manyhaveheardofsharkfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.Butdoyourealizethatyou’rekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup?听说，相当于hearabout Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharksbackintotheocean.Thisisnotonlycruel,butalsoharmfultotheenvironment.Withoutafin,asharkcannolongerswimandslowlydies.Sharksareatthetopofthefoodchainintheocean’secosystem.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.Manybelievethatsharkscanneverbeendangeredbecausetheyarethe切掉；切断adj.残酷的；残忍的adj.有害的beharmfulto对……有害不再在……顶部或顶端n.生态系统 strongestintheirfoodchain.Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.n.工业；行业在过去的20到30年里，是现在完成时的标志性时间状语之一 Environmentalprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharkfins.Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatthem?Helpsavethesharks!n.法律；法规adj.科学上的；科学的到目前为止；迄今为止是现在完成时的标志性时间状语之一 Readthepassagein3aquicklyandanswerthequestions.Sharksareatthetopofthefoodchainintheocean’secosystem.Yes,Ithinksharksareendangered.Becausewhenpeoplecatchsharks,theycutofftheirfinsandthrowthesharksbackintotheocean.Withoutafin,asharkcannolongerswimandslowlydies.Doyouthinksharksareendangered?Why?Whatdoyouknowaboutsharks? Peoplecatchsharksandcutofftheirfinsandthrowthembackintotheocean.Withoutafin,asharkdies.Whatdoyouthinkmighthavecausedafallinthenumberofsharks? Presentation3aReadthepassageaboutsharksandcompletethefactsheetbelow.WheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowgovernmentscanhelpTwoenvironmentalgroupsagainst“finning”InsouthernChina.Around70million.Todeveloplawstostopthesaleofsharkfins.WildAidandtheWWF. 3bReadthepassageagainandfillintheblankswiththewordsinthebox.1.Manypeopledonotrealizetheyarekillingawholeshark______theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,________iftheirnumbersdrop,theocean’secosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_______theyarewrong.whensobutsoalthoughifbutwhen 4.________therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday_______wedonotdosomethingtostopthesaleofsharkfins.Althoughif Post-readingSomepeopleliketoeatsharkfinsoup,especiallyin_________China.Butgettingthesharkfinisvery_____.Whenpeoplecatchthesharks,they________theirfinsandthrowthesharksintotheocean.Thesharksslowlydiesbecausetheycan’t_____withoutfins.Anditisalso________totheenvironment.Sharksareatthe___ofthefoodchain.Ifthenumberofsharksdropstoolow,itwillbreakthebalanceofthenature.Pleasesaynotoeatingsharkfinsoup,andtakeactiontosavethesharks!Retellthepassage.southerncruelcutoffswimharmfultop Savethesharks!Savethewildanimals! NotradeNomurder Languagepoints1.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.(教材P993a)“thenumbersof...”是“thenumberof…”的复数形式。Thenumbersofdifferentkindsofflowersaregrowingquickly. 【易混辨析】thenumberof...与anumberof...例词词义用法thenumberof...……的数量“thenumberof+可数名词复数”作主语时，谓语动词用单数形式。anumberof...一些；若干“anumberof+可数名词复数”作主语时，谓语动词用复数形式。Anumberofmeasureshavebeentakentoprotectwildanimalsbecausethenumberofthemhasbecomesmallerandsmaller. 2.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.(教材P993a)Lastyear,thepriceofthiskindofcarwas100,000yuan.Thisyearitfallsto80,000yuan.Itfallsby20percent.“fallby”意为“下降了”，by表示变化的幅度。fallto意为“下降到”。 Exercises一、单项选择1.—WhynotaskBobtojoinusinthetriptothezootomorrow?—Everyoneinourgrouplovesanimals,buthealwaysseems______.anxiousB.personalC.cruelD.careless2.Anumberofvisitors_______visitingtheWestLakeandthenumberofthevisitors_____increasing.are;isB.is;areC.are;areCA 3.Don’tplaygamesonthecomputerallday.It’s_______toyoureyes.A.harmfulB.thankfulC.usefulD.helpfulA4.ThedocumentaryAPlasticOceanissoimpressivethatI________itseveraltimessofar.watchedB.watchC.havewatchedD.willwatchC 二、根据汉语提示完成句子1.但是每一次当你喝一碗鱼翅羹的时候，你意识到你杀了一整只鲨鱼吗?Butdoyou________thatyou’rekillingawholeshark__________youenjoy____________sharkfinsoup?2.这种方式不仅残忍，而且对环境有害。Thisis________________,___________________theenvironment.3.如果它们的数量下降得太多，将会给所有的海洋生物带来危险。Iftheirnumbers________too________,itwill_________________alloceanlife.realizeeachtimeabowlofnotonlycruelbutalsoharmfultodroplowbringdangerto 4.很多人以为鲨鱼永远都不会濒临灭绝，因为他们是食物链的最强者。Many________thatsharkscan____________________becausetheyare_____________intheir____________.5.在过去的20年到30年，某些品种的鲨鱼数量下降了超过90%。______________somekindsofsharks______________over90__________inthelast20to30years.6.到目前为止，没有任何科学研究表明，鱼翅对健康有益，那么为什么还要吃它们呢?Sofar,no_________studies___________thatsharkfins_____________health,sowhy______them?neverbeendangeredhavefallenbybelievethestrongestfoodchainThenumbersofpercentaregoodforhaveshownscientificeat Homework1.Readandrecitethepassagein3a.3.Dotheexercisesinstudents’book.