Unit13We’retryingtosavetheearth!SectionA(3a—3c)【学习目标】1.学习并掌握新词汇：shark,fin,method,cruel,cutoff,harmful,chain,ecosystem,low,industry,law,environment,environmental,scientific2.学会并正确使用以下常用表达：hearof,cutoff,throw…into,nolonger,notonly…butalso,beharmfulto,atthetopofthefoodchain,thesaleof…,asksb.todosth.,sofar,begoodfor,beagainst,indanger3.学会使用以下句型：1)Doyourealizethatyou’rekillingawholesharkeachtimeyouenjoyabowlofshark’sfinsoup?2)Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.3)Thismethodisnotonlycruel,butalsoharmfultotheenvironment.4)Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.5)Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofshark’sfins.【重点难点】·Importantwords,phrasesandbeautifulsentences.·Givesomereadingskillsandletstudentsknowhowtousethem.【新知预习】根据句意和首字母提示完成单词。1.Thismethodisnotonlyc_______,butalsoharmfultotheenvironment.2.Sharksareatthetopofthefoodchainintheocean’se_______.3.Butinfact,around70millionsharksarecaughtandtradedinthisi_______everyyear.4.Manyhaveheardofshark’sf_______soup.5.Iftheirnumbersdroptoolow,itwillbringd_______toalloceanlife.【课堂探究】1.cutoff(1)砍掉，如：Hecutoffabranchfromthetree.(2)中断，如：Theywerecutoffinthemiddleoftheirtelephoneconversation.有关cut的词组：cutup:切碎如：Hecutupvegetablesintosmallpieces.cutdown：(1)砍倒，如：Manytreeswerecutdowninthisarea.(2)减少，如：Tocutdownairpollution,weshouldtakethebusorsubwayinsteadofdriving.2.notonly…butalso(1)用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅……而且……”;其中的also有时可以省略。如:Shenotonlyplayswell,butalsowritesmusic.她不仅很会演奏，而且还会作曲。(2)若连接两个成分作主语，其谓语通常与靠近的主语保持一致。如:Notonlyyoubutalsohehastoleave.不只是你，他也得离开。若连接两个句子，notonly后面的句子要用倒装，如:Notonlydidhespeakmorecorrectly,buthespokemoreeasily.他不仅说得更正确，而且讲得更不费劲了。【达标练习】I.单项选择。()1.Manyhave______shark’sfinsoup.A.heardofB.hearofC.hearingofD.heardfrom()2.Butdoyourealizethatyou’rekillingawholeshark______youenjoyabowlofshark’sfinsoup?A.ifB.whenC.butD.although()3.Whenpeoplecatchsharks,they_______theirfinsA.cutdownB.cutinC.cutoffD.cutup()4.Withoutafin,asharkcan________swimandslowlydies.A.notanymoreB.notanylongerC.notlongerD.nolonger()5.Sharksareatthetopofthefoodchain,_______iftheirnumbersdrop,theocean’secosystemwillbeindanger.A.butB.althoughC.soD.whenII.用所给单词的适当形式填空。1.Thisfamousandexpensivedishisespeciallypopularin_________(south)China.2._________(environment)protectiongroupsaroundtheworldareteachingthepublicabout“finning”.3.Theyhaveevenaskedgovernmentstodeveloplaws_________(stop)thesaleofshark’sfins.4.Sofar,no_________(science)studieshaveshownthatshark’sfinsaregoodforhealth.5.Around70millionsharksare_________(catch)andtradedinthisindustryeveryyear.III.根据所给汉语完成英语句子。1.这种著名而昂贵的菜在中国的南部特别受欢迎。Thisfamousandexpensivedishis__________________in_________China.2.但是，你能意识到当你在享受一碗鱼翅汤的时候，你正在杀掉一整个鲨鱼吗？Butdoyourealizethatyou’rekillingawholeshark__________________youenjoyabowlofshark’sfinsoup?3.这种方法不仅残酷，而且对环境的伤害特别大。Thismethodis________________cruel,__________________harmfultotheenvironment.4.鲨鱼在海洋生态系统中处于食物...
