Unit 5 Using language高中英语课件

Unit5Revealingnature

Usinglanguage

新标准《英语》高中选择性必修第一册PastperfectActivity1Lookatthesentencesfromthereadingpassageandanswerthequestions.1.Insentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?“evolvedfromacommonancestor.”2.Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?“evolvedfromlowerformsoflife.”3.Whatdoesthestructurehaddoneindicate?Itindicatestheactionhappenedbeforeacertainpastaction.Activity1Nowlookformoresentenceswiththepastperfecttenseinthereadingpassage,andsummariseitsuseinyourownwords.1.Itwasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.2....hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe“adisgracetoyourselfandallyourfamily.3.AfterDarwinhadspentsometimeinSouthAmerica,hisroomontheshipwascrowedwithsamplesoftheplantsandanimalshehadcollected.4.Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametime,andhadnotchangedsince.5.Itseemedtheirbeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.6.Overtime,ithadslowlyevolvedintomanynewspecies.Activity21.began2.hadledto3.developed4.choseto5.hadmadeCompletetheparagraphswiththeinformationfromthegivensentences.Activity3Completetheonlineencyclopaediaentrywiththecorrectformofthewordsinthebox.CompetedeclineeatLiveintroducearrivehadlivedeatenhadintroduced

competed

declinedarrivedActivity4

Actoutarole-playusingtheinformationinActivity3.OneofyouwillplaythekeeperofLonesomeGeorge,andtheotherwillplaythereporteraskingaboutGeorge.Usethepastperfecttensewhereappropriate.Workinpairs.BiodiversityActivity5

Listentothepodcastandchoosethestatementsthataremade.1Biodiversityisimportant.2Bacteriaarealwaysharmfultohumans.3Somespeciesofbacteriaareusedinfoodproduction.4Manyspeciesofbacteriarecycledeadorganicmatter.5Ourimmunesystemsareabletofightoffallgerms.Activity6Listenagainandcompletethefactsheet.Discusswhatyouknowaboutcellsandbacteriainpairs.thirtytrillionthirty-ninetrillionmadeupofcellsbricksthatareusedtobuildhouseshelpwithdigestionbreakdownActivity7Doyouknowabout......?Haveyouheardof......?Completetheboxeswiththeexpressionsfromthepodcast.Bytheway......Actually......Infact,......Speakingofwhich,…CheckingbackgroundknowledgeAddinginformationAnswerthequestions.Activity81.Whatspeciesarementionedandwhatisspecialaboutthem?

Twospeciesarementioned:thebluewhaleandthewaterbear.ThebluewhaleisthelargestanimalspeciesonEarth,whichcangrowuptoalmost30metresinlengthandweighover130,000kilos.Thewaterbearisprobablythetoughestspecies,whichcansurvivetemperaturesfrom150ºCtoabelowfreezing-272ºC.2.Whatotherunusuallifeformsdoyouknowof?Activity9ishometoarenativetoscientifichabitatsecosystemappearanceprimitiveancestorCompletetheparagraphswiththecorrectformofthewordsandexpressionsinthebox.Activity10Workinpairs.Lookatthepicturesof