[初三上]Unit 12 Mainly Revision(人教版)

　　Step1Lead–in
　　(ShowsomepicturestoattracttheSs’interestsaboutthetext.)
　　Step2Reading:
　　A.AsktheSstodosome“TrueorFalse”exercises
　　1.Somebirdswillflyawaytothesouthwhentheweatherturnscold;
someanimalshibernateinthecoldwather.(True)
　　2.Animalshibernateonlyintheearth.(False)
　　3.Noneofthewarm-bloodedanimalsneedtohibernatebecausetheyleadanactivelifewhichkeep
suptheirbodytemperatureeveninverycoldweather.(True)
　　4.Ahibernatinganimaldoesnotbreatheandcannotfeelanypain.(False)
　　B.Questionsandanswers:
　　1.Whydon’tsomewarm-bloodedanimalshibernateinthewinter?
　　(leadanactivelife,keepup,bodytemperature)
　　2.Whydocold-bloodedanimalshibernate?
(Whentheairtemperature,belowfreezing,bodytemperature,drop,cannotmoveabout;
almostnofoodinthewinter)
　　3.Howwouldyourecognizethatananimalishibernating?
　　C.Readingcomprehension:
　　1.Thetextmainlytellsusthat________.
　　A.hibernationismorethansleep
　　B.warm-bloodedanimalswilldothingsdifferentfromcold-bloodedanimalsinwinter
　　C.someanimalslivethroughthewinterbyhibernationorhalf-hibernation
　　D.animalsusedifferentwaystoprotectthemselvesagainstthecold(key:C)
　　2.Whydosomeanimalssleepunderthesnow?
　　A.Becausetheypreferthecoldairinthesnow.
　　B.Becausetheairinloosesnowwillhelptokeepthecoldout.
　　C.Becausetheycanadjust(调节)theirbodytemperaturetheretofitforthecoldweather.
　　D.Becausetheyarewarm-bloodedanimals.(key:B)
　　3.Whichsentencecarriesthemainideaofthesecondparagraph?
　　A.Sentence1.B.Sentence2.C.Sentence3.D.
　　Sentence4.(key:A)
　　4.Whycanthewolfkeepawakeinwinter?
　　A.Becauseitisacold-bloodedanimal.
　　B.Becauseitprefersmovingbynature.
　　C.Becauseitcankeepupitsbodytemperatureevenincoldweather.
　　D.Becauseithastogohuntingasaresultoflackoffoodforthewinter.(key:C)
　　5.Whydofrogsgotosleepunderthemudinwinter?
　　A.Becausetheycanescapefromtheirenemiesunderthemudandtheairtherewillkeep
thecoldout.
　　B.Becausetheairunderthemudwillkeepthecoldoutanditiscomfortablethere.
　　C.Becausetheyfeelcomfortablethereandtheycangetfoodeasily.
　　D.Becausetheyhaveenoughtoeatthere.(key:D)
　　6.Wewillknowananimalishibernatingif_______
　　A.ittouchescoldandisbreathingveryslowly
　　B.itissensitivetopain
　　C.itstemperaturedropstobelowzerocentigrade
　　D.itdoesnotmove(key:A)
　　7.Whycanahibernatinganimalmanagetolivethroughthewinter?
　　A.Becauseithardlymakesanymovementandbreathesveryslowlyandithasenough
fatstoredinitsbody.
　　B.Becauseithasalreadystoredsuppliesoffatinitsbody.
　　C.Becauseitwillnotuseenergywhilesleepingsincetheynevermakeanymovementthen.
　　D.Becauseitdoesn’tbreatheatall.(key:A)
　　8.Whydoesthebearstophibernatingonwarmwinterdays?
　　A.Becausethewarmthmakesitthinkthewinterhasgone.
　　B.Becauseithastoeatsomefoodforthenextlongsleep.
　　C.Becauseitfeelscoldandwantstowarmitselfuponwarmwinterdays.
　　D.Becauseitisgoingtohuntsomethingonwarmwinterdays.(key:A)
　　9.Whydoesasquirrelhidenutsbeforethebeginningofwinter?
　　A.Becauseitwilleatalotinwintertokeepwarm.
　　B.Becauseitishardtofindfoodinwinter.
　　C.Becauseitneedstoeatalottohibernate.
　　D.Becauseitneedsnutstofightagainstitsenemies.(key:B)
　　10.Wehumanbeingsareabletokeepthecoldoutbecause________
　　A.wearewarm-blooded
　　B.wearecleverenoughtobuildhousesandtowearclothes
　　C.wearecold-blooded,andwedonotneedtohibernate
　　D.forhumanbeings,hibernationwillusemoreenergy(key:A)
　　Step3:languagepoints:
　　本单元重点句型
　　(1)Hibernationismorethansleep.
　　(2)Peoplewhofindhibernatinganimalsasleepoftenthinkthattheyaredead.
　　(3)Youcantouchit,orevenpullitstail,withoutcausingittomoveorwakeup.
　　(4)Hibernatinginthatway,theanimalscansleepallthroughthewinter.
　　(5)Thesecondisconnectedwiththemainusethebodymakesoffood—tosupplytheenergyformovements.
　　(6)Wehaveseenthathibernatinganimalreducesmovementstofarbelowtheordinarylevel.
　　(7)Theanimalhardlymakesanymovement,hardlyusesanyenergy,andhardlyneedsanyfood.
　　(8)Someanimals,includingsomebears,onlyhalf-hibernate.
　　难句解析：
　　1．Theygotosleepinallkindsofplaces.它们到各种各样的地方去睡觉。
　　gotosleep，fallasleep与sleep，这三个词（组）都有“睡着”之意。gotosleep意思是“睡着，去睡觉”，fallasleep意思是“睡着了，酣睡”，它们都表瞬间动作，如表持续性动作或延续性状态，要用动词sleep。e.g.
　　①Ifounditverydifficulttogotosleep．我发现很难人睡。
　　②Soonhefellasleep，forhewasverytired．他很累，很快就睡着了。
　　③wehaveslept(for)eighthours.我们已睡了八个小时。
　　2．Theyleadanactivelifewhichkeepsuptheirbodytemperatureeveninverycoldwinter
weather.
　　他们生活得很活跃，即使在严寒的冬天也能保持正常的体温。
　　习惯用法
　　（2）keepup保持，维持，继续，e．g．
　　①LetshopethesunnyweatherkeepsupforSaturdaystennismatch.但愿星期六网球比赛时还是这样的好天气。
　　②We。Arehavingdifficultykeepingup。our。mortgagepayments．我们难以继续支付分期偿还的抵押货款。
　　③Ifyouwanttobeaperformer，you11havetokeepupyourpiano．如果你真想成为演奏家，就得坚持练习钢琴．
　　3.Thenitasnochoicebuttoliedownandsleep．于是，别无选择，它们只好躺下睡觉。
　　havenochoicebuttodo表“别无选择”之意。e．g．
　　HaveIanychoicebuttodoasyoutellme？除了按你吩咐的去做外，我还有别的选择吗？
　　表示“别无选择只好做……”之意，除了可用havenochoicebuttodo…来表达外，还可用下列固定搭配：
　　（l）candonothingbutdo／cannotdoanythingbutdo，e．g．
　　Icandonothingbutaccepthisdemand．我只好接受他的要求。
　　（2）thereisnothinglefttodobutdo…，e．g．
　　Therewasnothingleftforhertodobutcry．她别无它法，只有哭。
　　（3）can’tbutdo…，e．g．
　　Icouldnotbutadmitthathewasrightand。Iwaswrong．我不得不承认他对了，我错了。
　　疑难点拨：
　　1.Hibernationismorethansleep．冬眠不仅仅是睡眠。
　　句中的morethan相当于notonly。意为“不仅仅”。e．g．
　　Heis。moreateacher．Heisagoodfriendofmine。他不只是老师，还是我的益友。
　　2．Peoplewhofindhibernatinganimalsasleepoftenthinkthattheyaredead.．人们看到处于冬眠状态的动物，常常以为它们死了。
　　这是一个复合句。
　　（l）who－clause是定语从句修饰people，that－clause是宾语从句作think的宾语。
　　（2）asleep是表语形容词，在句中一般只作表语，宾补，或后置定语，这样的形容词还有alive，alike，alone，awake等。
　　3．Youcantouchit,orevenpullitstailwithoutcausingittomoveorwakeup.你可以摸它，甚至可以拉它的尾巴，这也不会使它动一动或醒过来。
　　这个句子可改写成：Evenifyoutouchitorpullitstail，youcan’tcauseitmoveorwakeup.
　　4.Hibernatinginthatway,theanimalcansleepallthroughthewinter.
　　用那种方式冬眠，动物可以睡过整过冬天。
　　句中的hibernatinginthatway是现在分词短语在句中作状语，相当于astheyhibernateinthatway。
　　5．Wehaveseenthathibernatinganimalreducesmovementstofarbelowtheordinarylevel.．冬眠动物的活动量减少到远远低于一般水平。
　　(1)句中的farbelow意为“远远低于，比……低得多”。e．g．
　　InwinterthetemperatureofHarbinisfarbelowthatofWuhan．
　　冬天哈尔滨的气温比武汉的低得多。
　　（2）句中的reduce．．to作“减少，使处于……状态”解。e．g．
　　①Thehousewasreducedtoashesbythebigfire.那场大火把屋子化为灰烬。
　　②Themanwasreducedtobeggingforfood．那男人沦落到讨饭的地步。
　　Step4:Fillinblanks.
　　1.Theygotosleepinallkindsofplaces.Redsquirrelsdisappearinsidetrees,
bearsusecaves,frogsgodeepunderthemud,andmanyotheranimalsdigholesintheearth.
Agoodmanyanimalssleepunderthesnow.Thereisalotofairinloosesnow,
andthishelpstokeepthecoldout.
　　2.Hibernationismorethansleep.Itisaverydeepsleep.theanimal’stemperaturedropsto
justoverzerocentigrade,anditsheartbeatsveryslowly.Peoplewhofindhiberna
tinganimalsasleepoftenthinkthattheyaredead;thebodyfeelsverycold,
andtheanimalmaybreatheonlyonceeveryfiveminutes.Ahibernatinganimalcannot
feelanypain.Youcantouchit,orevenpullitstail,withoutcausingittomoveorwakeup.
　　3.Hibernatinginthatway,theanimalcansleepallthroughthewinter.
Youmightwonderhowitmanagestolivewithuteatingforsomanymonths.
Theanswerliesintwofacts.Thefirstisthatithasstoredsuppliesoffatinitsbodyduring
thesummerandautumn.Thesecondisconnetedwiththemainusethebodymakesoffood­----tosupplytheenergyformovement.Wehaveseenthatthehibernatinganimalreduces
movementtofarbelowtheordinarylevel.Eventhemovementsoftheheartandlungsare
greatlyreduced.Theanimalhardlymakesanymovement,hardlyusesanyenergy,
andhardlyneedsanyfood.
　　Step5:Homework:Writeasummaryofthetest.