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1、unit 13 we are trying to save the earth 每课的练习题语言目标谈论污染和环境保护。SectionA重点短语1.makeadifference起作用；有影响2.takepartin参加3.turnoff关掉4.payfor付费；付出代价5.cutdown减少6.leadto导致7.hearof听说8.cutoff切除SectionA(1a-2d)【基础预习】I.写出下面单词的意思。1.littler_2.bottom_3.fisherman_3.coal_5.ugly_6.advantage_7.cost_8.wooden_9.plastic_II.把下面的
2、短语与汉语意思搭配。1.makeadifference A.参与推荐精选2.cutdown B.充满3.leadto C.减少4.befullof D.起作用5.playapartin E.导致 通往【重点讲练】辨析：turn,get与becomebecome多指身份、职位等的变化，它强调变化的过程已经完成，后面可接名词或形容词。Hebecomesateacher.他成了一名老师。get多用于口语，表示一种变化过程，强调的是“渐渐变得”，后常接形容词的比较级形式。Inwinterthedaysgetshorter.冬季白天变得较短。turn指在颜色和性质等方面与以前的完全不同，强调变化的结果山
3、里的树叶已变成了棕色。【小试牛刀】用turn,get和become填空。Hermother_angrywhensheheardthenews.推荐精选2Its_darkeranddarkeroutside.Themilkhas_bad.cutoff切断；切除cutinto把切成cutup切碎cutin插队【小试牛刀】单项选择DidyoutellittoJack?Yes,butwewere_inthemiddleofourtelephoneconversation.A.cutdownB.cutoffC.cutupD.cutinto辨析：spend,cost,take,pay花费主语表示的内容【小
4、试牛刀】单项选择1.Doyoutakeexerciseeveryday?Yes.Ialways_thirtyminutesaftersupper.A.spendB.costC.takeD.pay2.I_$300forthebike.A.tookB.spentC.costD.paid【达标训练】.用方框中所给词的适当形式填空。cost,wood,coal,bottom,litter1.Dont throw_ (垃圾)everywhere.2.Inwinter,manypeopleburn_(煤)to推荐精选keepwarm.3.Thepolicefoundabodyatthe_(底部)ofthe
5、lake.4.The_(费用)oflivinginbigcitiesisveryhigh.5.Hekeepsarabbitinabig_(木制的)box.II.单项选择。1.He_gooutwithhisparents,butnowhe_stayingathomealone.A.usedto;isusedtoB.isusedto;usedtoC.useto;isusedtoD.isusedto;isusedto2.Theinterestingbook_me10yuan.A.spentB.tookC.paidD.cost3.Wemustdosomethingusefulto_pollution.
6、A.cutoffB.cutupC.cutdownD.cutin4.Smokingcan_lungcancer.Youdbettergiveitup.A.workonB.leadtoC.takeawayD.putout5.Whatarethe_ofbikeriding?Itcanhelpcutdownairpollution.A.advantages推荐精选B.reasonsC.resultsD.ideasIII.根据汉语提示完成下面的句子。2.这个木箱时装满了书。The_ box_books.3.不健康的饮食对这种疾病的传播起一定的作用。Unhealthyfoods_thespreadof t
7、he illness4.这条小路通向公园。Thepath_thepark.5.我错拿了你的包。Itookyourbag_minebymistake.SectionA(3a-4c)【基础预习】I.根据汉语提示写出下面句中所缺的单词。1.Ihaveasimpleandeasy_(方法)tosolvetheproblem.2.Weshouldntbe_(残忍的)推荐精选toanimals.3.Its_(有害的)toyourhealthtodrinktomuch.4.Thecityisthe_(工业)centerofthecountry.5.Thecaristooexpensive,Icant_(买得
8、起)it.II翻译1.takepartin_2.turnoff_3.payfor_4.hearof_5.beharmfulto_【小试牛刀】改为同义句。Readinginthesundoesharmtooureyes.Readinginthesun_oureyes.2.Haveyouevertakenpartinanenvironmentalproject?你曾经参加过环境保护活动吗？辨析：join,joinin和takepartin加入组织，团体，党派等，有作join为其中的一个成员的含义。后面也可以加表示人的名词，表示和某人一起参加某活动。推荐精选joinin加入一种具体活动。takepa
9、rtin指参加会议或群众性活动等，着重说明句子主语参加该项活动afford是动词，意为买得起,担负得起，通常与can,could,beableto连用,多用于否定句中。I.用方框中词的适当形式完成下面的句子。method,cruel,harmful,afford,law1. Ithinkits_tomakesuchayoungboyworkallday.2.Thepoorfishermancant_hischildrenseducation.3.Ithinkthegovernmentmustdevelop_toprotectenvironment.4.Eatingtoomuchjunkfood
10、is_yourhealth.5.Hecanusedifferent_toworkouttheproblem.II.单项选择。1.Areyougoingto_anyoftheevents?Yes.Maybelongjumpandhighjump.A.takepartinB.joinC.attendD.joinin推荐精选2.Icantafford_himanexpensivebirthdaypresent.A.tobuyB.buyingC.forbuyingD.buy3.Rememberto_thelightswhenyouleavetheroom.OK.Iwill.A.turnonB.turn
11、downC.turnupD.turnoff4.Thegirlalwayshassomemoneyto_snacks.A.spendB.payforC.takeD.cost5.Look!_boysareplayingontheplayground.Yes._themisabout200.A.Thenumberof;AnumberofB.Thenumberof;ThenumberofC.Anumberof;thenumberofD.Anumberof;AnumberofIII.根据汉语提示完成句子。推荐精选1.我们必须采取行动来阻止他们。Wemust_tostopthem.2.我从没听说过这个人。Ihavenever_suchaman.3.我们乐意尽力帮你摆脱困境。Wearegladtodowhatwecando_.4.到目前为止，我已经交了二十个朋友。_,I
