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Unit7Theunknownworld第1课时——词汇课后拓展课时精讲栏目导航课时过关重点词汇学习。1．unknownadj.未知的Let’sgetintoanunknownworld.让我们走进一个未知的世界。unknown是由否定前缀un+形容词known构成。意为“未知的”。【拓展】（1）un-是含有否定意义的词缀如：unhappy（不快乐），unpleasant（不愉快的），unimportant（不重要的）等等。（2）knowv.知道；了解；认识过去式：knew过去分词：knownShekneweverythingwouldchange.她知道一切都会改变。（3）knownadj.有名的；著名的；出名的Mr.Williamisaknownjudge.威廉先生是一位著名的法官。【搭配】beknownfor=befamousfor因……而出名beknownas=befamousas作为……而出名【小试牛刀】Thoughthepolicehavetriedtheirbest,thewoman’sidentityremains（known）．尽管警察已经尽他们的全力，但这个女人的身份依然未知。unknown2．receivev.收到IreceivedyourletterofNovember7．我收到了你11月7日的来信。【辨析】receive,accept和take（1）receive表示收到这一客观事实。ThenhesmiledandtoldmeIwouldreceiveanextra$100ayear.后来他笑了，并且告诉我说，我将收到一年100美元的额外收入。（2）accept表示主动而且高兴地接受。Shehasreceivedhispresent,butshewillnotacceptit.她收到了他的礼物，但她不会接受的。（3）take表示的“接受”包含着有人“赠给”的意思。Didyoutakehisadvice?你接受了他的建议了吗？【小试牛刀】（）Whatwouldyoudoifyou_______arequestlikethis?A．acceptB．receiveC．takeB3．frightenedadj.（=afraidoranxious）害怕的；惊吓的IwasfrightenedwhenIsawthesnake.=Iwasafraid/anxiouswhenIsawthesnake.当我看到那条蛇的时候，我很害怕。（1）frighteningadj.令人害怕的Ican’tforgetthatfrighteningexperience.我忘不了那段令人恐惧的经历。（2）frightenv.使惊恐；使害怕Theghoststoryfrightenedthechildren.这个鬼故事使孩子们十分惊恐。【拓展】befrightenedof…害怕……befrightenedtodosth.害怕/不敢做某事【小试牛刀】Sheis（frighten）ofdarknessbecauseshethinksthatdarknessis（frighten）．她害怕黑夜，因为她认为黑夜是令人害怕的。frighteningfrightened4．discoverv.发现；发觉；找到Shediscoveredthatthemanwasathief.她发现那个人是小偷。【同根词】discoveryn.发现；被发现的事物ThediscoveryofAmericachangedthewholeworld.美洲的发现改变了世界。【小试牛刀】Newscientific（discover）aremadeeveryday.每天都有新的科学发现。discoverie5．terribleadj.非常讨厌的；可怕的；令人极不快的Thealiendiscoveredthemandmadeaterriblenoise!外星人发现了他们，并且发出可怕的声音！【同根词】terriblyadv.非常地；极端地；很Iamterriblysorryforthat.我为此感到很抱歉。【小试牛刀】（）Theywerecaughtina_______storm,andtheyfelt_______frightened.A．terribly;terribleB．terrible;terriblyC．terribly;terriblyB6．wonder（=wanttoknow）v.想知道；想弄明白wonder有以下用法：（1）wonder+wh-+不定式Iwaswonderingwheretospendtheholiday.我想知道去哪里度假。（2）wonder+if（whether）从句Iwonderifyouarefreethisevening.我想知道你今晚是否有空。（3）wonder+atsth.对某事感到奇怪Wewonderathisdoingthat.我们对他做的那件事情感到很奇怪。【同根词】wonderfuladj.极好的；精彩的wonderfullyadv.极好地；精彩地【小试牛刀】Iwasjust（wonder）ifyoucouldhelpme.我只是想知道你能否帮助我。wondering7．refusev.拒绝Weaskedhimtocome,butherefused.我们叫他来,可是他拒绝了。【搭配】（1）refusetodosth.拒绝做某事Theyrefusetoadmitthere’saproblem.他们不承认有问题。（2）refusesth.拒绝某事Sherefusedhisinvitation.她拒绝了他的邀请。【小试牛刀】（）Hewillbeverysadifyou_______hisinvitation.A．acceptB．refuseC．discoverB8．explainv.解释Wouldyoupleaseexplaintousthesecretofyoursuccess?你可以向我们解释一下你的成功秘诀吗？【同根词】explanationn.解释；说明Yourplanneedssomeexplanations.你的计划需要作一些说明。【搭配】explainoneself说明自己的意思（动机）；为自己的行为辩解Hetriedtoexplainhimself.他试图为自己辩解。【小试牛刀】（）—Letme_______,sir.—Don’ttellmeaboutit.Idon’twanttoknow.A．explainB．thinkC．tryA9．pleasedadj.（=happyorglad）高兴的；满意的；愉快的I’mverypleasedtohearfromyou.收到你的来信我很高兴。【同根词】（1）pleasuren.①愉快；高兴；满足；乐事；乐趣Ireadforpleasure.我读书消遣。②（受到感谢时的一种礼貌回答）别客气；不用谢；是我的荣幸—Thanksverymuchanyhow.—无论怎样，非常感谢。—It’sapleasure.—别客气!（2）pleasingadj.令人愉快的；讨人喜欢的；使人满意的；合意的Suchaviewispleasing.这样的景色令人心旷神怡。（3）pleasev.使高兴；使满意；讨人喜欢；讨好Morethananything,Iwanttopleaseyou.最重要的是，我想让你高兴。【搭配】bepleasedwith=behappywith/besatisfiedwith对……很满意Wearepleasedwiththehouse.我们对这栋房屋很满意。bepleasedtodosth.=behappytodosth.很高兴做某事Iampleasedtomeetyouhere.我很高兴在这里见到你。【小试牛刀】（）Iwasactuallyquitepleasedwithmyselfasyoucanimagine.（同义替换）A．angryB．sadC．satisfiedC一、从下面每小题的A、B、C三个选项中选出可以替换划线部分的最佳答案。（）1．Thechildrenranawayinfear.A．feelingtiredB．feelinghappyC．feelingafraidC（）2．Thechildrenspreadtheirwingsandflewtoschooltogether.A．opened…outwardsB．put…togetherC．foldedA（）3．Wefeltverypleasedtoseeyouhere.A．happyB．sadC．angry（）4．Irefusetobelieveyoubecauseyoualwaystelllies.A．say“yes”B．agreeC．say“no”（）5．Dadlookedatthepieceofpaperwiththestrangemarksonit.A．signsB．picturesC．photosAAC（）6．IreceivedyourletterofNovember8．A．gotB．reachedC．arrived（）7．Iwonderifyouarefreethisevening.A．doubtB．wanttoknowC．thinkAB（）8．Shementionedthefilmshesawjustnow.A．talkedaboutB．thoughtaboutC．complainedaboutA（）9．Thisplaceisknownforitswinecounties.A．popularB．welcomeC．famous（）10．Suddenly,therewasahugelightning.Thechildrenwereallfrightened.A．frighteningB．braveC．scaredCC二、根据题意和括号内的提示语，完成下列句子。1．Let’sgetintoan（未知的）world.2．I（收到）yourpresentyesterday.3．Iwas（害怕的）whenIsawthesnake.4．Whofirst（发现）America?5．Therewillbearailway（路线）betweenShenzhenandBeijing.unknownreceivedfrighteneddiscoveredline6．I（想知道）whenhewillcome.7．Weaskedhimtocome,buthe（拒绝）.8．Please（解释）whyyouneedthesethings.9．I’mvery（高兴的）tohearfromyou.10．Hisdreamistoworkasan（宇航员）．wonderrefusedexplainpleasedastronaut一、完成句子。1．中国因长城而出名。ChinatheGreatWall.isknown/famousfor2．她不敢夜间出去。Sheisatnight.3．我想知道他为什么上学迟到。Ihewaslateschool.frightenedtogooutforwonderwhy4．他拒绝在圣诞节那天和我们去购物。HewithusonChristmasDay.5．我们的老师对我们的出色表现很满意。Ourteacherourwonderfulperformance.refusedtogoshoppingispleased/satisfied/happywith二、完形填空。WhydoIwanttogotocollege?Noonehaseveraskedmesuchaquestion.ButmanytimesIhaveasked1.Ihave2alotofreasons.ThemostimportantreasonisthatIwanttobea3man.Manythingsmakehumanbeings4orbetterthanorevensuperiortoanimals.Oneofthemos