北师大版高中英语选择性必修第二册UNIT6 Section Ⅰ Period4课件

Period4

UNIT6

THEMEDIA主题语境人与社会——科技发展与信息技术创新

SectionⅠ

TOPICTALK&LESSON1课时学案单元语法讲练it的用法一、it作人称代词1．指上文提到的事物，以避免重复Xi'anisabeautifulcity，isn'tit?西安是个美丽的城市，不是吗？2．指动物、婴儿(未知性别的婴儿或孩子)或不明身份的人—Isthisyourdog?—No，itisn't．——这是你的狗吗？——不是。Hernewbabyistiny；itonlyweighs2kilos．她刚生的宝宝个头很小，才两千克重。—Whoisitknockingatthedoor?—Itmightbethepostman．——谁在敲门？——可能是邮递员。3．指天气、时间、距离、环境等Itisalovelyday，isn'tit?天气不错，不是吗？Itwasnearlymidnightwhenshecameback．她回来时已近午夜。Itwasveryquietinthecafé．咖啡馆里非常安静。Itishalfanhour'swalktothecitycentrefrommyhome．从我家到市中心有半小时的步行路程。二、it作形式主语1．it作形式主语代替动词不定式(1)Itbe＋adj．＋(forsb．)todosth．此处的形容词通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，wrong，important，unimportant，legal，illegal，well-mannered，ill-mannered，polite，impolite，clear，obvious，certain，suitable，proper，fit，useful，useless，dangerous等。Itisillegal(forateenager)todriveacarwithoutalicence．(青少年)没有驾照开车是违法的。(2)Itbe＋adj．＋ofsb．todosth．此处的形容词通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，thoughtful，thoughtless，careful，careless，silly，foolish，stupid，clever，wise，crazy等。It'skindofyoutohelpmewiththeproblem．帮我解决这个问题，你真是太好了。(3)Itbe＋n．＋todosth．Itisourdutytoprotecttheenvironment．保护环境是我们的责任。2．it作形式主语代替动词-ing形式短语It'snouse/nogood/nofun/awasteoftimedoingsth．Itisnousegivinghimsomeadvice．给他提建议没有用。3．it作形式主语代替主语从句(1)Itis＋adj．＋从句Itisclear(obvious/true/possible/certain...)that...该句型中的It是形式主语，真正的主语是that引导的主语从句。Itisveryclearthathe'sroundandtalllikeatree．很明显他又胖又高像一棵树。(2)Itis＋v．-ed＋that...＝sb．/sth．is＋v．-ed＋todoItissaid(reported/learned/believed/thought/known/told/hoped...)that...该句型中的It仍是形式主语，真正的主语是that引导的主语从句。ItissaidthathehascometoBeijing．据说，他已经来北京了。Itisreportedthatanotherearthsatellitehasbeenputintoorbit．据报道，另一颗地球卫星已发射进轨道。(3)Itis＋n．＋that...Itisapity(ashame/anhonour/agoodthing/afact/asurprise...)that...在该句型中，如果表示出乎意料等情感，that后的从句一般用虚拟语气，即谓语动词用“should＋动词原形”，should可省略；没有这种意义时，则不用虚拟语气。Itisapitythatsuchathing(should)happeninyourclass．这种事竟然发生在你们班上，真是遗憾！Itisapitythatheisill．他生病了，真遗憾！[即时训练1]单句语法填空/完成句子①___wasveryquietinthegarden．②Whereismydictionary?Ileft____

rightonthedesk．③Youcanlumpthathatifyoudon'tlike__．④人们认为这是迄今为止发现的最早的，也是最大的古代造纸作坊。_______________thatitistheearliestandlargestancientpaper-makingworkshopsiteeverfound．ItititItisbelieved三、it作形式宾语1．it作形式宾语代替动词不定式短语v．＋it＋adj．/n．＋(forsb．)todosth．Hemakesitarulenevertoborrowmoneyfromothers．他的规矩是从不向别人借钱。Iconsideritadvisabletotellherbeforehand．我认为还是事先告诉她好。2．it作形式宾语代替动词-ing形式短语v．＋it＋nogood/nouse/novalue/worthwhiledoingsth．IthinkitnogoodspendingtoomuchtimewatchingTV．我认为花太多时间看电视是没有好处的。3．it作形式宾语代替从句v．＋it＋adj．/n．＋从句Weallthoughtitapitythattheconferenceshouldhavebeencancelled．会议竟然被取消了，我们都感到很遗憾。4．固定搭配动词appreciate/hate/love/like/dislike后面接if或when引导的从句作宾语时，中间需用形式宾语it，构成“appreciate/hate/love/like/dislike＋it＋if/when从句”。Ihateitwhenhetalkswithhismouthfull．我讨厌他嘴里塞满了东西跟人说话。四、强调句型中的it1．肯定句Itis/was＋被强调部分＋that/who＋其他部分：ItwasinBeijingthatIsawthefilmMy

Motherland

and

Me．我是在北京看了电影《我和我的祖国》。2．否定句Itis/wasnot＋被强调部分＋that/who＋其他部分；Itis/wasnotuntil...＋that＋其他部分：ItwasnotforseveralyearsthatIhadanopportunitytoseehimagain．＝Ididnothaveanopportunitytoseehimagainforseveralyears．我好几年没有机会再见到他了。Itwasnotuntiltwelveo'clocklastnightthathewenttobed．＝Hedidn'tgotobeduntiltwelveo'clocklastnight．昨晚他12点才去睡觉。ItwasnotuntilIgotoffthebusthatIrealisedit．＝Ididn'trealiseituntilIgotoffthebus．直到下车我才意识到这一点。3．疑问句(1)强调句的一般疑问句只需把is/was提前，即：Is/Wasit＋被强调部分＋that/who＋其他部分：Wasityouwho/thatbrokethewindow?是你把窗户打破的吗？(2)强调句的特殊疑问句只需在一般疑问句前加上疑问词即可，即：疑问词＋is/wasitthat＋其他部分：Whowasitthatbrokethewindow?打破窗户的是谁？Whenwasitthatyoucalledmeyesterday?你昨天是什么时候打电话给我的？[名师点津]

(1)不论强调句子的哪一部分，都可用that连接句子的其余部分。(2)被强调部分指人时，可用who取代that。(3)it之后的be动词的时态通常要与that之后的谓语保持一致。[即时训练2]单句语法填空/完成句子①Ithink____

nogoodreadinginbed,whichdoesgreatharmtoyoureyes．②I'dappreciate____

ifyoutakemyinvitationintoconsideration．③他是昨天买的这本书吗？

________________thatheboughtthebook?ititWasityesterday短文语法填空1．__wasasunnyday．Peterdecided2．_____(go)forawalktothepark，though3．__wastwomilesaway．4．__wassocomfortabletowalkonthestreet．Suddenly5．__begantorain．Hefound6．__hardtowalkthere．Sohehadtotakeabushome．Unfortunately,7．__wentwrong．Afterwaitingforaboutanhour，hehadnoalternativebut8．_______(walk)home．Whenhegothome，hewaswetthrough．Thus9．__wasadaythathewouldneverforget．Howawful10．____wastogothroughsuchanexperience!IttogoitItititittowalkititⅠ．单词拼写1．Allthe__________(候选人)forthepositionadvertisedinthenewspapermustdeliveraspeechrespectivelyonJuly15．2．Onlinelearningbenefitsmealotbecausesomanylearningmaterialsare_________(可获得的)．3．TheSummerPalaceisagood___________(可供选择的事物),whichissuretoleaveanequallydeepimpressiononus．课时分层作业（七）candidatesavailablealternative4．I_________(购买)thebookGone

with

the

Windfromthebookstoreyesterday．5．Recently,ourschooliscarryingoutaprogram,whichcallsoneveryonetothrowrubbishintotherightdustbinaccordingtothefour__________(种类)．6．Theresearchlackssolid_____(证据)，andtherefore，itsconclusionsaredoubtful．7．Ifyouhaveanydoubtsaboutyourhealth，you'dbetter_______(咨询)yourdoctoratonce．purchasedcategoriesproofconsult8．Afterthenewswas_________(广播)thatourspaceshipreturnedtotheearthsafely，weallcheeredwithgreatjoy．9．Lastweekwehadaheated______(辩论)aboutwhethercitizenscanaccesstheScienceMuseumfreeofcharge．10．Youcanrelyonmetohelpyouwhenyouaretroubledby___________(复杂的)problems．broadcastdebatecomplicatedⅡ．单句语法填空1．Thiscreationattractedalotofattentionthankstoits_______(mix)ofmodernandtraditionalChineseelements．2．Theydebatedforoveranhour____

thequestionraisedbytheprofessor．3．Adirtyfaceisnotappropriate_____

theschoolphotograph．4．We'dappreciateitifyoucouldsparesometimetogothroughour__________(adapt)．mixtureonforadaptation5．Helovestocatchup____

thenewsafteratripabroad．6．Ididn'tknowwhethertointerprethersilence__acceptanceorrefusal．7．Teamworkisacknowledged__themostimportantaspectofanyenterprise．8．Inthe________(elect)lastweek,MrLiwasappointedleaderofthesecuritydepartmentbecauseofhisexcellenttalents．9．Youshouldgivethepolicedetailsoftheaccidentandthat's_________(precise)whatIwanttoknowaswell．10．Theyexpectedalltheirchildren_____(be)highachievers．onasaselectionpreciselytobeⅢ．阅读理解AOnlineEventsVirtualBookTastingNeedanewbookforthemonth?Thencomeandgetatasteofavarietyofnewandpopularbooksfromourlibrariansthatareinourcollection!ThiseventwilltakeplaceoverGMeet．Registrationbeginsat9am,October28．DateandTime:3pm,November23Host:PelhamParkway-VanNestLibrary,onlineonlyAudience:teachers,teens/youngadultsLunchtimeVirtualHandwritingDenWhenwasthelasttimeyousentathank-younotetoabelovedone?Comeandputpentopaper．Write,chat,andshare(notrequiredbutencouraged)inasafe,welcoming,andfriendlyenvironment．DateandTime:1pm,November30Host:MuhlenbergCommunityLibrary,onlineonlyAudience:adultsFamilyStorytimeJointhestaffatFortWashingtonLibraryforalive,onlineprogramwithsongs,rhymes，andfavouriteread-aloudbooks．Boththeparent/caregiverandthechildmustbepresentduringtheentireprogram．DateandTime:10:30am,December7Host:FortWashingtonLibrary,onlineonlyAudience:children,infants(0－18monthsold),toddlers(18－36monthsold),preschoolers(3－5yearsold)TeenBookDiscussion:SportsBooksComeandhearaboutbooksaboutyourfavouritesportsandtellusaboutyours．ThiseventwilltakeplaceoverGMeet．Youmustregisterwithyouremailaddresstoreceivethelink,approximatelyonedaybeforetheprogram,toparticipate．DateandTime:3:30pm,December8Host:PelhamPublicLibrary,onlineonlyAudience:teens/youngadults*Pleasenote:Forallevents,registrationisrequiredonline．【语篇解读】本文是一篇应用文。文章介绍了四个网络在线活动。1．WhocanattendLunchtimeVirtualHandwritingDen?A．Children． B．Toddlers．C．Adults． D．Teens．C

[细节理解题。根据小标题LunchtimeVirtualHandwritingDen下的“Audience:adults(观众：成人)”可知，成年人可以参加LunchtimeVirtualHandwritingDen。故选C。]√2．Whichlibraryoffersaneventaboutsportsbooks?A．PelhamPublicLibrary．B．MuhlenbergCommunityLibrary．C．FortWashingtonLibrary．D．PelhamParkway-VanNestLibrary．√A

[细节理解题。根据小标题TeenBookDiscussion:SportsBooks下的“Comeandhearaboutbooksaboutyourfavouritesportsandtellusaboutyours．”可知，“TeenBookDiscussion:SportsBooks”活动是关于体育书籍的，再根据后文“Host:PelhamPublicLibrary,onlineonly”可知，PelhamPublicLibrary主办了关于体育书籍的活动。故选A。]3．Whatdothefoureventshaveincommon?A．Theyencouragepersonalexperience．B．Theytakeplaceintheafternoon．C．Theyareabouttellingstories．D．Theyneedonlineregistration．√D

[细节理解题。根据最后一段“Pleasenote:Forallevents,registrationisrequiredonline．”可知，这四个活动的共同之处是都需要在线注册。故选D。]BPortiaKapraunhasalwaysseenunwelcomeadsonsocialmedia,usuallyfrommajorbrandspitching(推销)herexpensivejewelryorvehiclesthatshe,asalibrarianinIndiana,couldnotafford．Ms

Kapraunwasnotinterested．Butshesoonsawtheadsagain．Andagain．Andagain．“Thesefeellikelow-endads，”shesaid．Inashakyadvertisingmarketinanuncertaineconomy,adsthatfewpeoplewanttoseesuddenlyseemtobeeverywhere．Advancementsindigitaladvertisingtechnologyweremeanttoimproveusers'experience．Peopleinterestedinshoesareintendedtogetadsforsneakersandboots,notrepeatedpitchespromotinggoldinvestments．Andthetechnologyissupposedtoremovemisleadingordangerouspitches．Butlately,onseveralplatforms,theoppositeseemstobehappeningforavarietyofreasons,includingaslowdownintheoveralldigitaladmarket．Asnumerousdeep-pocketedmarketshavepulledback,andthesoftermarkethasledseveraldigitalplatformstolowertheiradpricing,opportunitieshaveopenedupforlessdemandingadvertisers．Advertisingexpertsagreethatpoor-qualityadsappeartobeincreasinggreatly．Theypointtoavarietyofpotentialcauses:internaltroublesattechnologycompanies,weakcontentmoderation(审核),andhigh-leveladvertisersseekingotherchoices．Then,there'stheeconomy:Arecentsurveyof43multinationalcompaniesrepresentingmorethan$44billioninadvertisingspendingfoundthatnearly30percentplannedtocutbackontheirmarketingspendinglastyear．Otherfactorsarealsocontributingtoloweringadvertisingquality．Socialmediaadvertising,onceonlypractisedbyspecialists,isnoweasilyavailabletoanyone．Manyofthemareavoidingtargetedads—placementsintendedtoreachspecificaudiences,usuallyatahighercost—infavourofacheaperspray-and-pray(广撒网式的)approachonline,hopingtocatchtheattentionofgullible(容易受骗的)orboredshoppers．“Majorsocialmediaplatformsarenowlikeamallthatusedtobegood”，CoreyRichardson,vicepresidentatamulticulturaladcompany,says．“Butnowthere'snolongeramallthere—it'sjustaplacesellinganything．”【语篇解读】本文是一篇说明文。文章讲述的是随着数字广告市场的低迷和经济的不确定性，用户开始在社交媒体平台上遇到越来越多低质量的广告，这些低质量的广告导致主要的社交媒体平台逐渐变得没有吸引力，只剩下了一些低价的广告商。4．WhatmessagedoestheauthorwanttodeliverinPortiaKapraun'sstory?A．Repeatedadshaveastrongpowerofpersuasion．B．Socialmediausersoftenencounterunwantedads．C．Majorbrandsusuallyprefersocialmediaadvertising．D．Anuncertaineconomyleadstolowerlevelsofconsumption．√B

[推理判断题。

根据第一段中的“PortiaKapraunhasalwaysseenunwelcomeadsonsocialmedia,usuallyfrommajorbrandspitchingherexpensivejewelryorvehiclesthatshe,asalibrarianinIndiana,couldnotafford．Ms

Kapraunwasnotinterested．Butshesoonsawtheadsagain．Andagain．Andagain．”可知，作者想在PortiaKapraun的故事中传达的信息是社交媒体用户经常会遇到不想要的广告。故选B。]5．Whatcanbeinferredaboutthe“lessdemandingadvertisers”mentionedinparagraph2?A．Theyareforcedtoexitinthedigitaladmarket．B．Theyhavebenefitedfromadvertisingexperts．C．Theyworkhardtoimprovetheirusers'experience．D．Theycannowadvertiseatamoreaffordableprice．√D

[推理判断题。

根据第二段中的“Asnumerousdeep-pocketedmarketshavepulledback,andthesoftermarkethasledseveraldigitalplatformstolowertheiradpricing”可知，由于广告市场放缓，财力雄厚的广告资本退出市场，因此很多数字平台降低了广告的定价，从而导致很多要求很低的广告商获得了机会，即可以以较低的价格承接广告，因此我们可以从lessdemandingadvertisers推断出，他们现在可以以更实惠的价格做广告。故选D。]6．WhatisCoreyRichardson'sattitudetomajorsocialmediaplatforms?A．Disappointed． B．Unclear．C．Favourable． D．Hopeful．√A

[观点态度题。

根据最后一段中的“Manyofthemareavoidingtargetedads—placementsintendedtoreachspecificaudiences,usuallyatahighercost—infavourofacheaperspray-and-prayapproachonline,hopingtocatchtheattentionofgullibleorboredshoppers．‘Majorsocialmediaplatformsarenowlikeamallthatusedtobegood’，CoreyRichardson,vicepresidentatamulticulturaladcompany,says．‘Butnowthere'snolongeramallthere—it'sjustaplacesellinganything．’”可知，如今的社交媒体平台倾向以更便宜的在线“广撒网式的”方式投放广告吸引购物者的注意，而非更高成本的定向投入广告，因此降低了广告的质量，由此可推知，CoreyRichardson对当前社交媒体平台的态度是失望的。故选A。]7．Whichofthefollowingisasuitabletitleforthetext?A．WhereIsSocialMediaAdvertisingHeading?B．WhatIsShakingUptheOnlineAdvertisingMarket?C．WhyAreYouSeeingSoManyBadDigitalAdsNow?D．HowAreTargetedAdsImpactingYourPurchaseDecisions?√C

[标题归纳题。通读全文，尤其是第二段中的“Butlately,onseveralplatforms,theoppositeseemstobehappeningforavarietyofreasons,includingaslowdownintheoveralldigitaladmarket．Asnumerousdeep-pocketedmarketshavepulledback,andthesoftermarkethasledseveraldigitalplatformstolowertheiradpricing,opportunitieshaveopenedupforlessdemandingadvertisers．”和第三段中的“Advertisingexpertsagreethatpoor-qualityadsappeartobeincreasinggreatly．Theypointtoavarietyofpotentialcauses:internaltroublesattechnologycompanies,weakcontentmoderation,andhigh-leveladvertisersseekingotherchoices．”以及第四段中的“Otherfactorsarealsocontributingtoloweringadvertisingquality．”可知，本文主要讲的是随着数字广告市场的低迷和经济的不确定性，用户开始在社交媒体平台上遇到越来越多低质量的广告，这些低质量的广告导致主要的社交媒体平台逐渐变得没有吸引力，只剩下了一些低价的广告商。故选C。]Ⅳ．阅读七选五Likeitorloveit,socialmediaisamajorpartoflife．Teensspendmorethanhalfoftheirwakinghoursonline．Theyusesomeofthattimetopostpicturesandcreateprofilesonsocialmediaaccounts．1

.Clickingonathumbs-uporahearticonisaneasywaytostayintouch．2Somesocialmediasitesusethoselikestodeterminehowmanypeopleeventuallyseethepost．Onewithmanylikesismorelikelytobeseenandtogetevenmorelikes．What'smore,viewingpostswithalotoflikesactivatestherewardsysteminourbrain．3Forexample,postsrelatedtoalcoholmayencourageteenstodrink．Thatmeansthatwhatyoulikeonlinehasthepowertoinfluencenotjustwhatotherslike,butevenwhattheydo．4Andnotalwaysinagoodway．Forexample,inone2011study,teensdoingadrivingtaskinalabtookmoreriskswhentheirfriendswerearound．Researchersalsolookedattheteens'brainsduringthistask．Theysawtheactivityinapartofthebrainthat'sinvolvedinrewards,whichsuggeststheteenswerechangingtheirbehaviourtotrytogetsocialapproval．Joiningsocialmediacangivepeopleasenseofbeingintheknow．Butpostsmayexaggerate(夸大)howwellourfriendsandothersarefeeling,maki