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1、Unit1keyWatchingPart1I.1.C2.C3.DII.photographingcheetahshelping(save)cheetahsMoremiWildlifeReserve,BotswanaChrisJohns,photographer;DaveHamman,guidetrucks,camerasPart2I.AII.1.inthebrush,whattheyhadbeenhopingfor2.lossofhabitat3.extinct,unspeakable4.naturalworld5.capable,gain6
2、.makeakillPart3I.(C)→(A)→(F)→(B)→(E)→(D)II.1.week2.fine3.morning4.reedbucks5.preyIII.1.Thechallengeistokeepyourconcentration,toconstantlylook.2.Theyscaneverythingfromheavybushestoopengrasslands,hopingtocatchsightofher.3.Chrismustwaittoseeifthemothercheetahwilllethimbackinto
3、hertrust.4.Themenmustdriveasquicklyaspossibleinordertogettheshot.5.Ifanotherpredatormovedinonher,themothercouldbeambushed.Part4I.1.F2.T3.F4.T5.FII.1.clicks2.focuses3.freezes4.walks5.smell6.lickFollow-upI.Day1?:GDay2?:B,C,DDay3:FAweeklater:A,EReadingReadingComprehensionDBDDC
4、BAcapturingcautiousprotectHomeListeningI.C,D,AII.1.T2.T3.F4.F.5.FIII.1.Studieshaveshownthatalmostalllivingthingswilleventuallybecomeextinct.2.Inmanycases,replacementspeciesemergeovertime.3.Humanactivityishavingatremendousnegativeimpactonextinctionrates.4.Someoftheworld’sspe
5、ciescannotsurvivewithouthelp.5.Somegroupsmayhaveavestedinterestinnotprotectingcertainspecies.KeytoWatch,ListenandRead(Unit2)WarmupI.1.fur2.carnivore3.blubber4.Arctic5.marinemammalII.FBCGDAEPart1I.FTTTFII.Edgeinhospitablethrivemammalsurvivalfrozenadjustmentsinsulatedreserves
6、III.1.Oneanimalactuallythrivesinthesefreezing,lonelysurroundings.2.Thesemarinemammalsspendmostoftheirlivesonfrozenseas.3.Polarbearsdon’tenjoytheluxuryofanuninterruptedwinter.4.UnlikethehighArctic,there’snopermanenticepackhere.5.WhentheBaymelts,thebearsareforcedtoshore.Part2
7、.I.Whentheweatherstartstoturncold,largenumbersofthemgatheraroundthecoast.Atthistime,peoplecanobservethematcloserange.2.TheyareeagerlywaitingfortheBaytofreezesothattheycangobacktothefrozeniceandtheirfoodsource.3.Peopleuse“tundrabuggies”,aspecially-designedtruck,toseethem.4.B
8、ecausenootheranimalhuntsthem,andtheyareatthetopofthefoodchain.II.1.private2.compan
