北师大版英语选修7单元综合检测Unit20

单元综合检测(二)Ⅰ.阅读理解(共15小题；每小题2分，满分30分)ADearStudentBody，Sincecanoeing(划独木舟)hasbeemorepopularinrecentyears,theOutdoorClubhasdecidedtoofferanexcitingopportunityforstudentstoexploretheirsurroundings.Inthepast，theclubhasgonehiking,bicycling,andfishing.Thisyear，theOutdoorClubmemberswouldliketoinviteallinterestedstudentsatRedlandOaksJuniorHighSchooltogoalongonacanoeingnaturetourofCanyonLake.ThegroupwillleavethisSaturdayat9：00amfromthemainentrancetoCanyonLakeStatePark.Studentsdon'tneedtobeamemberoftheclubtoenjoythejourney.Themainfocusofthenaturetourwillbetoobservethevariousspeciesofbirdsfoundinthearea.TheCanyonLakeBird­watchersClubreportsthatthevarietyofspeciesandnumberofbirdsintheareahaveincreasedgreatlyoverthepastfiveyears.Manybird­watchershavefoundtheareatobeagreatplacetotakephotosoftheirfavoritelocalbirds.Tourguideswillbeonhandtoansweranyquestionsaboutthebirds.Besuretobringanotepadtowritedownanythingyoumayfindinteresting.ThetourguideswillmeetusattheentrancetoCanyonLakeStatePark.Afterageneralintroduction，theguideswillgooverthesafetyrules,andthenthestudentswillbreakintopairs.Eachguidewillthentakeonepairofstudentsonatourofthelake.TheOutdoorClubwillprovidecanoes，oars(桨)andlifejackets.Students,however，willneedtosupplytheirownsunscreen,sunglasses,andhats.Itisgoingtobeahotday,sopleasedonotforgetthisequipment.TheOutdoorClublooksforwardtoseeingyouonthisexcitingtour.Sincerely，TyReidPresident，RedlandOaksJuniorHighOutdoorClub【语篇解读】本文是应用文。文章主要介绍了去CanyonLakeStatePark的自然之旅。1．Whatdoweknowaboutthetour?A．Schoolteacherswillgoonthetouraswell.B．Itincludesfishing,bicyclingandcanoeing.C．Non­membersoftheclubcanalsojointhetour.D．ItwasstartedbyRedlandOaksJuniorHighSchool.C[细节理解题。由第一段的最后一句可知，非俱乐部会员也可以参加这次旅行。]2．Whatisthemainaimofthenaturetour?A．Topracticecanoeing.B．Totakepicturesofbirds.C．Tofindsomethinginteresting.D．Towatchmanykindsofbirds.D[细节理解题。由第二段中的“Themainfocusofthenaturetourwillbetoobservethevariousspeciesofbirdsfoundinthearea.”可知，这次旅行的主要目的是观察各种鸟类。]3．Studentsareexpectedto．A．bringlifejacketsandanotepadB．preparesunprotectionequipmentC．learnthesafetyrulesbythemselvesD．askquestionsabouttheirfavoritebirdsB[细节理解题。由倒数第二段中的“Students，however，willneedtosupply...donotforgetthisequipment.”可知，学生需要准备防晒用品。]BFromself­drivingcarstocarebots(care＋robots)forelderlypeople,rapiddevelopmentintechnologyhaslongrepresentedapossiblethreattomanyjobsnormallyperformedbypeople.Butexpertsnowbelievethatalmost50percentofoccupationsexistingtodaywillbepletelyunnecessaryby2025asartificialintelligencecontinuestochangebusinesses.“Thenextfifteenyearswillseearevolutioninhowwework，andarevolutionwillnecessarilytakeplaceinhowweplanandthinkaboutworkplaces，”saidPeterAndrew，DirectorofWorkplaceStrategyforCBREAsiaPacific.Agrowingnumberofjobsinthefuturewillrequirecreativeintelligence,socialskillsandtheabilitytouseartificialintelligence.Thereportisbasedoninterviewswith200experts，businessleadersandyoungpeoplefromAsiaPacific，EuropeandNorthAmerica.ItshowsthatintheUStechnologyalreadydestroysmorejobsthanitcreates.Butthereportstates：“Losingoccupationsdoesnotnecessarilymeanlosingjobs—justchangingwhatpeopledo.”Growthinnewjobscouldoccurasmuch，accordingtotheresearch.“Thegrowthof20to40personpaniesthathavethespeedandtechnologicalknow—howwilldirectlychallengebigpanies，”itstates.A2014reportbyPewResearchfound52percentofexpertsinartificialintelligenceandroboticswereoptimisticaboutthefutureandbelievedtherewouldstillbeenoughjobsinthenextfewyears.Theoptimistspictured“afutureinwhichrobotsdonottaketheplaceofmorejobsthantheycreate”accordingtoAaronSmith,thereport'sco­author.“Technologywillcontinuetoaffectjobs,butmorejobsseemlikelytobecreated.Althoughtherehavealwaysbeenunemployedpeople，whenwereachedafewbillionpeopletherewerebillionsofjobs.Thereisnoshortageofthingsthatneedtobedoneandthatwillnotchange，”Microsoft'sJonathanGrudintoldresearchers.【语篇解读】本文讲述了未来社会的人工智能大发展，大约50%的职业将消失，但失去职业并不等于丢掉工作，只是改变了人们所做的是什么——人们将从事更具有创造性的工作。4．Accordingtothereport，．A．peoplewon'tnecessarilylosejobsB．bigpanieswillfacefewerchallengesC．smallpanieswillwinagainstbigpaniesD．mostpeoplewillbeeinterestedintechnologyA[推理判断题。根据第五段中的“Losingoccupationsdoesnotnecessarilymeanlosingjobs—justchangingwhatpeopledo.”可知，失去职业并不等于丢掉工作，只是改变了人们所做的是什么。故选A。]5．Wecaninferfromthetextthatinthefuture．A．peoplewillfacemanydifficultiesB．peoplewilltakeupmorecreativejobsC．artificialintelligencewillthreatenpeople'slivesD．mostjobswillbedoneintraditionalworkplacesB[推理判断题。根据第三段“Agrowingnumberofjobsinthefuturewillrequirecreativeintelligence，socialskillsandtheabilitytouseartificialintelligence.”可知，人们将会从事更具创造性的工作。故选B。]6．Whatistheattitudeofmostexpertsinartificialintelligenceandroboticstothefuture?A．Mixed. B．Worried.C．Hopeful. D．Doubtful.C[推理判断题。根据倒数第二段第一句可知，这些人工智能的专家们对未来充满了希望。故选C。]7．JonathanGrudin'swordsinthelastparagraphsuggestthat．A．therewillbeenoughjobsforpeopleB．thingswillchangealotinafewyearsC．manypeoplewillbeeunemployedD．technologywilltotallychangefuturejobsA[推理判断题。根据最后一段可知，在未来社会，人们虽然会失业，但却会面临更多的需要创造性的工作。故选A。]CThelatesttechnologyinventionsin3Dprintingarerapidlychanginghowthingsarebeingmade.AttheInternationalManufacturing(制造业)TechnologyShowinChicago，alittle­knowncarmakerbecamepopularbymanufacturingacarattheshow.Itwasafullyfunctionalcarthatwas3Dprintedin44hoursandassembled(装配)intwodays.Thecariscalleda“Strati”，Italianforlayers，sonamedbyitsdesignerMicheleAnoebecausetheentirestructureofthecarismadefromdifferentlayersofmaterials.Theaveragecarhasmorethan20，000partsbutthislatesttechnologyreducesthenumberofpartsto40.“Thegoalhereistogetthenumberofpartsdownandtodropthetoolingcoststoalmostzero，”saidJohnB．RogersJr.，chiefmanagerofLocalMotors.“Carsareridiculouslyplex，”headded,referringtothethousandsofbitsandpiecesthataresourced,assembledandconnectedtomakeavehicle.Thistechnologycanuseavarietyofmaterialstomanufactureanythinginplicateddetail.Imagineifyoucouldorderanewcaronlineaccordingtoyourneedsandpickituporhaveitdeliveredtoyouthenextdayatasmallpartofthecostofbuyingonefromashop?Whatifyoucouldmakesmallpartsatalowercostratherthanbuyingthemfromapartssupplier?Whatagreatchangewouldthatbefortheindustry?It'salreadyhappening.Oneofthechallengeswithcollectingantique(古老的)carsisreplacingparts.Youcan'tbuythembecausethey'renotinuseandit'sdifficulttofindthepartsthatfit.Butnowpeoplecanuse3Dprintingtechnologytomakepartsfortheircars.JohnB.RogersJr.believesthatinthenearfutureacarwillbemadeinjust60minutes.Thepanyisalreadyorganizingaworldwidenetworkof“Microfactories”whereyoucanorderandpickupyourpersonalizedcar.【语篇解读】本文是说明文。3D打印汽车的亮相改变了人们对传统汽车制造业的认识，将来人们能直接从网上订购满足个性化需求的汽车。8．Whatimpressedpeopledeeplyattheshow?A．Acarmaker.B．A3D­printedcar.C．Thevarietyofcars.D．Technologyinventions.B[细节理解题。由第一段中的“3Dprintingarerapidlychanginghowthingsarebeingmade”和第二段中的“alittle­knowncarmakerbecamepopularbymanufacturingacarattheshow”可知，在本次展览会上最使人印象深刻的是一辆3D打印汽车。]9．Whatdoweknowaboutthe“Strati”car?A．It'samodelcar.B．ItwasmadeinItaly.C．Ithasover2，000parts.D．Itwasmadewithinfourdays.D[细节理解题。由第三段中的“Itwasafullyfunctionalcarthatwas3Dprintedin44hoursandassembled(装配)intwodays.”可知，这辆被称作Strati的汽车是一台真正的运转正常的汽车，在四天之内就完成了打印和装配。]10．ThequestionsinParagraph5areraisedto．A．analysethelatesttechnologyB．challengetraditionalcarmakersC．explainhowthechangehappenedD．showtheadvantageofthetechnologyD[写作意图题。由第五段中的第一句可知，本段提出的这几个问题都是为了说明用3D技术打印汽车的优势。]11．WhatisJohnB．RogersJr.'sattitudetowardsthetechnology?A．Positive. B．Doubtful.C．Surprised. D．Disappointed.A[推理判断题。由最后一段可知，JohnB．RogersJr.对于这一技术的前景很有信心，故选A项。]DChineserailwayexpertshavebeguntalksonbuildingarecord­breakinghigh­speedrailthatwouldconnectInnerMongoliainthenorthtoHainaninthesouth.AccordingtotheShaanxiDevelopmentandReformmission，theproposedlinewilloperateataspeedof350kilometersperhour(217mph)．BeginninginInnerMongolia'sBaotouandrunningthroughsouthernShaanxi，Hubei，Hunan，GuangxiandGuangdong,itsfinalstopwouldbeinHaikouonHainanIsland，China'ssouthernmostprovince.TheproposedrailispartofChina'saimtocreateanother“SilkRoadofthe21stCentury”andimprovethecountry'stransportationnetworkwhiledrivinglanddevelopmentandurbanization(城市化)insomeprovincialareas.Manyoftheprovincesthroughwhichthehigh­speedtrainswilltravelarenearmajorbodiesofwater，suchastheYellowRiverinInnerMongoliaandShaanxi，theYangtzeRiverinHubeiandtheSouthChinaSea，wherethelinewouldend.ItwillalsotakepassengerstopopulartouristdestinationsincludingZhangjiajie，Xi'an，GuilinandminorityareasinwesternHunanandHubei.“Thecountryisnowshiftingitsfocusandinvestinginthewesternregionsandeconomicallyunderdevelopedareas，makingupforChina'slongdebttotheseareas，”TanYuzhi，professoroftheSchoolofEconomicsandManagementatHubeiUniversityforNationalities，toldlocalmedia.“Theprojectwillsignificantlynarrowregionaldisparities(差异)andsolveminorityissues.”However，DengHongbing，directorofChinaUniversityofGeosciences'CenterforRegionalEconomicandInvestmentCenter，saidthatifthenorth­to­southrailwayistogoahead，thereneedstobeasoundecologicalprograminplacetoensuretheprotectionoftheseunderdevelopedandecologicallysensitiveareas.【语篇解读】本文是新闻报道。据悉中国将建设一条从包头到海口的高铁线路，这条线路途经7个省，时速将达到350千米/时。12．Whatisthepassagemainlytalkingabout?A．Chinahasdecidedtoinvestinthewesternareas.B．Anotherhigh­speedtrainlineisbeingplanned.C．Thetrainwillspeedupto350kilometersperhour.D．Chinahasproducedthebesthigh­speedtrainline.B[主旨大意题。这是一篇新闻报道，讲述了计划在中国西部建设一条高铁线路。下面内容围绕这条铁路各项事宜展开，故正确答案为B。]13．Howmanyprovinceswilltheproposedlinecross?A．9. B．8.C．7. D．6.C[细节理解题。文章第二段提到了这条线路要穿过陕西、湖北、湖南、广西、广东，起点是内蒙的包头，终点是海南岛的海口。因此它跨越了7个省。故正确答案为C。]14．Oncethehigh­speedraillineisbuilt，．A．itwillbethelongestraillineinChinaB．itwillbenefittheundevelopedareasalotinthewestC．itwilltransportgoodsfasterfromthenorthtothesouthD．itwilldogoodtotheenvironmentalongsidethelineB[细节理解题。根据文章第四段的尾句可知，一旦这条高铁线建成，它会给沿途的省市的旅游业带来发展的动力。故正确答案为B。文中提到了高铁运送乘客，没有说运送货物，故排除C项。]15．WhatisTanYuzhi'sattitudetowardstheproposedproject?A．Ironical. B．Doubtful.C．Puzzled. D．Supportive.D[推理判断题。根据文章中TanYuzhi所说的话可知，该线路的建设会对比较落后的西部地区的发展有利。故正确答案为D。]Ⅱ.阅读七选五(共5小题；每小题2分，满分10分)16Inthefutureyourautomobilewillrunonwaterinsteadofgas！Youwillbeabletobuyasuperputerthatfitsinyourpocket!Youmightevendriveaflyingcar!Notallpastpredictionshavebeenprovedwrong.17Somegreatthinkerspredictedthearrivalofthecreditcard，thefaxmachineandeventheInternet—yearsbeforetheyhappened.Butforeachpredictionthathasetrue，someothershavemissedbyamile.Manyofthesepredictionsdidn'tconsiderhowpeoplewouldwanttousethetechnology，orwhetherpeoplereallyneededitintheirlivesornot.Let'slookatsomepredictionsfromthenot­too­distantpast.18Where'stherobotinmykitchen？Nowhere，ofcourse.Andhe'sprobablynotinganytimesoon.Robotsdoexisttoday,butmostlyinfactoriesandotherworkingenvironments.Backinthe1950s，however，peoplesaidthatbynowpersonalrobotswouldbeinmostpeople'shomes.Sowhyhasn'tithappened?Maybebecauserobotsarestilltooexpensiveandclumsy.Andprobablytheideaofrobotscookingourdinnersandwashingourclothesisjusttoostrange.Athomeweseemtobedoingfinewithoutthem.19In1964anAmericanpanyintroducedthevideotelephone.Theysaidbytheyear2000mostpeoplewouldhaveavideophoneintheirhomes.Butofcoursetheideahasn'tcaughtonyet.Why？Thetechnologyworkedfine，butitoverlookedsomethingobvious：Peopledesireforprivacy.Wouldyouwanttohaveavideophoneconversationwithsomeoneafteryoujuststepoutoftheshower?Probablynot—itcouldbeunfortable！Justbecausetechnologydoesn'talwaysmeanpeoplewillwanttouseit.Andfinally，howaboutthatcrazypredictionoftheflyingcar？20Butaflyingcarremainsoneofthemostwonderfultechnologyideastocatchourimagination.Keepwatchingthenews—orperhapstheskyoutsideyourwindow—toseewhatthefuturewillbring.A．It'snotsocrazyanymore!B．Afewofthemhavebeensurprisinglyaccurate.C．RobotHelpersD．PredictionsoftheFutureE．Ithasn'tappearedyet!F．Whatwillourfuturelifebelike?G．TelephonesofTomorrow【语篇解读】本文是说明文。随着科技的发展，许多过去被认为不可能实现的预言实现了，但是有一些还尚未实现。也许将来的某一天这些预言就会实现。16．D[通读全文可知，本文介绍了一些现在已实现的或现在未实现、将来会实现的预言，故选D。]17．B[前一句说并非所有过去的预言都是错误的。后面就举了几个已经实现的预言的例子，故此处选B。]18．C[接下来三段介绍了家用机器人的预言及其未实现的原因，故此处选C。]19．G[接下来讲了可视的预言及其未能实现的原因，故选G。]20．A[前一句说“会飞的汽车”是一个疯狂的预言，后面说它有可能在将来实现，故这一预言一点也不疯狂，选A。]Ⅲ.完形填空(共20小题；每小题1.5分，满分30分)MyfriendKennyandhisfamilyhadjustreturnedfromDisneyWorld.“IsawasightI'll21forget，”hesaid.“Iwantyoutoknowaboutit.”Heandhisfamilywere22Cinderella's(灰姑娘)castle.Itwaspackedwithkidsandparents.Suddenlyallthechildrenrushedtoone23．Ifithadbeenaboat，thecastlewouldhavetippedover.Cinderellahad24.Kennysaidshewasabeautifulyounggirlwitheachhair25，whiteskin,andasweetsmile.Shestoodinthegardenof26，eachwantingtotouchandtobetouched.ForsomereasonKenny27andlookedtowardtheothersideofthecastle.Therewasaboywhomightbesevenoreightyearsold.His28washardtodeterminebecauseofhisheight.Dwarfed(侏儒)inheight，hestood29quietly,holdingthehandofanolderbrother.Itwasvery30thathewantedtobewiththechildren.He31tobeinthemiddleofthekidsreachingforCinderella.Butcan'tyoufeelhis32ofbeingturneddown？Fearofbeinglaughedatagain?ButCinderella33thelittleboy.Sheimmediatelybeganwalkinginhisdirection.34butfirmlyinchingthroughthecrowdofchildren，shebecame35．Shewalkedquicklyacrossthefloor，bentdownandplaceda36onhisface.“Ithoughtyouwould37thestory，”Kennytoldme.Idid.It38meoftheoneyouandIhadheardofbefore.Thenamesare39，butisn'tthestoryalmostthesame？Inbothcasesagiftwasgiven.Inbothcaseslovewas40．Inbothcasesthelovelyoneperformedagesturebeyondwords.【语篇解读】迪士尼乐园的成功就在于它给每个参观的孩子都留下了难忘的一幕！那个优雅大方、超凡脱俗的灰姑娘更是给孩子们留下了深刻的印象！在迪士尼乐园里，同样的故事每天都在上演：那送出的吻，那分享的爱……一个可爱的姑娘通过动作诠释了语言无法表达的内涵！21．A.always B．oftenC．ever D．neverD[根据上文“MyfriendKennyandhisfamilyhadjustreturnedfromDisneyWorld.”我的朋友Kenny和他的家人刚从迪士尼乐园回来，后句Kenny说的话“我想让你也知道。”可见他很激动，因此他永远不会忘记那个情景，never永远不。故选D。]22．A.outside B．insideC．beside D．behindB[根据下文“Itwaspackedwithkidsandparents.”可知，他和他的家人应该是在灰姑娘城堡的里面。inside里面。故选B。]23．A.side B．stepC．wall D．stopA[后句说“Ifithadbeenaboat，thecastlewouldhavetippedover.”如果城堡是一艘船的话则会翻船，可知所有的孩子都向一边跑去。side边。故选A。]24．A.left B．startedC．entered D．disappearedC[根据下一段Kenny说她是个美丽的年轻姑娘，可以推测出应该是灰姑娘进来了。enter进入。故选C。]25．A.inlength B．inplaceC．inpeace D．inadvanceB[根据上文“Kennysaidshewasabeautifulyounggirl”可知，eachhairinplace是形容灰姑娘头发齐整。inplace在适当的位置。故选B。]26．A.students B．girlsC．parents D．kidsD[第二段提到“Itwaspackedwithkidsandparents.”同时后文提到每一个都想摸一摸灰姑娘，根据这个行为可知，此处应该是灰姑娘站在一群孩子中间。kids孩子们。故选D。]27．A.turned B．whisperedC．jumped D．shookA[根据后句说Kenny看向了城堡的另一边可以推测他先是转过身来。turn转身。故选A。]28．A.name B．appearanceC．age D．mindC[由前文“Therewasaboywhomightbesevenoreightyearsold.”那个男孩可能是七岁或八岁，可知，由于他的身高，他的年龄不确定。age年龄。故选C。]29．A.thinking B．watchingC．listening D．searchingB[根据后文说这个男孩拉着哥哥的手，渴望和其他孩子一起，可推测他应该是静静地看着眼前的情景。watch观看。故选B。]30．A.strange B．stupidC．humorous D．obviousD[由于前文已经将小男孩渴望的情感和表现描写得十分具体，因此应该是很明显可以看出他想和其他孩子们在一起。obvious明显的。故选D。]31．A.longed B．failedC．regretted D．pretendedA[前句已经交代他想和其他孩子一起，因此他是渴望站在孩子们中间，伸手去触摸灰姑娘。long渴望。故选A。]32．A.pleasure B．angerC．fear D．amusementC[前文提到他想去但是没有去，而后句又提到“Fearofbeinglaughedatagain？”，故此处应与fear相照应。故选C。]33．A.protected B．noticedC．supported D．savedB[后文说灰姑娘朝着小男孩走去，可以推断灰姑娘一定先是注意到了男孩。notice注意到。故选B。]34．A.Rudely B．HardlyC．Relaxedly D．PolitelyD[由前文得知灰姑娘被许多小孩围着肯定不能轻松地越过人群，同时灰姑娘也不会粗鲁地对待孩子，因此是礼貌却又坚定地从孩子们之间挤过去。politely礼貌地。故选D。]35．A.tired B．busyC．free D．astonishedC[根据上文“butfirmlyinchingthroughthecrowdofchildren”可知，灰姑娘自由了。free自由的。故选C。]36．A.kiss B．handC．gift D．touchA[根据后面所接的搭配“onhisface”，在他脸上能留下的应该是一个吻。kiss亲吻。故选A。]37．A.catch B．appreciateC．follow D．inspireB[根据前文得知Kenny讲述了一个温暖的故事，而且说给我听肯定是希望我会喜欢这个故事。appreciate喜欢，欣赏。故选B。]38．A.warned B．informedC．reminded D．cheatedC[根据前文可知，它使我想起我以前听过的一个故事。remindsb.ofsth.意为“使某人想起某事”。故选C。]39．A.different B．importantC．necessary D．uniqueA[根据后文说难道故事情节不是一样的吗？可知此处名字应该是不一样，与后文出现的same相呼应。different不同的。故选A。]40．A.separated B．dividedC．expanded D．sharedD[根据前文说在两个故事中，都有礼物被送出，因此应该是都有爱被分享(share)。故选D。]Ⅳ.语法填空(共10小题；每小题1.5分，满分15分)KeepingadiaryinEnglishisan41.________(effect)waytoimproveourEnglishwritingability.42．________(pare)withotherformsofwriting,itisshorterandtakes43.________(little)time.Itcanhelpustodevelopthehabitof44.________(think)inEnglish.Ifwepersistinthispractice，45.________(gradual)we'lllearnhowtoexpressourselvesinEnglish.InkeepingadiaryinEnglish,wecertainlyrunupagainstmany46.________(difficulty).Inthefirstplace，47.________oftenhappensthatwehavetroublefindingproperwordsandphrasestogiveexpressiontoourmind.Secondly,therearemanyidiomatic(地道的)waysofsayingthingsinChinese.Anditisextremelyhardforus48.________(put)themintoEnglishproperly.AsfarasI'mconcerned,mysuggestionisthatweshouldalwayshaveanotebookandaChinese­Englishdictionary49.________easyreach.Wheneversomethingbeatsus,wecanfirstputitdowninournotebookandthenconsultourdictionary.WecanalsoturntoourEnglishteacherforhelp，ifnecessary.Inshort,IbelievethatitisofgreatusetokeepadiaryinEnglishfor50.________developmentofourwritingskills.【语篇解读】本文是议论文。作者认为用英语写日记是提高英语写作能力的有效方法并列举了这种方法的优势。41．effective[所填词修饰名词way，表示“有效的方法”，故填effective。]42．pared[分析句子结构可知，pare的逻辑主语是it，两者之间为被动关系，句中已有谓语动词，故此处填pared作状语。注意首字母大写。]43．less[and连接两个并列成分，由shorter可知，此处应填little的比较级less。]44．thinking[在介词of后，故用thinking。]45．gradually[修饰整个句子，作状语，故用副词。]46．difficulties[根据所填词前的many可知，此处应填difficulties。difficulty作“难题，难事”讲时是可数名词。]47．it[分析句子结构可知，此处真正的主语是that引导的从句，从句中缺少作形式主语的it，故此处填it。]48．toput[“Itis＋形容词＋forsb.＋todosth.”表示“做某事对某人来说是……的”，是固定句式。]49．within[withinreach意为“在手边”，为固定搭配。]50．the[此处特指“写作技巧的提高”，故用the。]Ⅴ.短文改错(共10小题；每小题1分，满分10分)The“onlychild”policyhasbeenchangedinourcountry.Itispossiblethatsomeofusmayhaveabrotherandsister.Inasurveyabouttheacceptanceofasibling，mostof