国开电大 01878综合英语(1) Unit1-14 单元练习答案

1、国开电大01878综合英语(1)Unit1-14单元练习答案题目随机，请使用Ctrl+F组合键查找题目答案国开电大01878-综合英语(1)-Unit1单元练习答案题目:Ihopewewillabusinessrelationshiptobenefitbothofourcompanies.正确答案：strikeup题目:Itwasreallyverygoodyoutohelpmethatheavysuitcase.正确答案：of.with题目:Languages,EnglishandFrench,arenotdifficulttolearnforhim.正确答案：suchas题目:Onthei

2、rwaytoschooltheyahighwind.正确答案：runinto题目:Theplaneat10:45.Thereisstillanhourtogo.正确答案：takesoff题目:Theplaneat10:45.Thereisstillanhourtogo.正确答案：takesoff题目:Afterhefinishedhishomework,hehispenandstretchedhimself.正确答案：putdown题目:Allthechildrenlistenedtohiswitheagerattention.正确答案：adventures题目:Doyoustillremem

3、bertheGreatBarrierReef?Youweresoscared.正确答案：diving题目:Hethetechnicalskillincomputerwhileworkinginthecompany.正确答案：pickedup题目:HeistheEuropeanformanyJapanesecompanies.正确答案：agent题目:IwenttoLondonbusinesslastyear.正确答案：on题目:Ivegottogoingnow,otherwiseIwillmisstheopeningoftheshow.正确答案：set题目:Makealistofdiffere

4、ntplacesyouveto.正确答案：been题目:Thatwomanhadsomedifficultiesherheavyluggage.正确答案：carrying题目:Thegovernmentspentalotofmoneymakethislandbetter.正确答案：helping题目:Theplaneat10:45.Thereisstillanhourtogo.正确答案：takesoff题目:Theresearchcenteranewplananddecidedtocarryitoutimmediately.正确答案：workedout题目:Theresultoftheexpe

5、rimentwasquitefromwhatIexpected.正确答案：different题目:Thestudentalwaysanexcuseforhisbeinglate.正确答案：madeup题目:Therealotoftreesaroundourvillage,butnowtheyareallgone.正确答案：usedtobe题目:Thereweremanypeopleoutsidethebuilding,inlinefortheconcerttickets.正确答案：waiting题目:Thesenewproductswillbeforelong.正确答案：comeout题目:T

6、heyenjoyedarideonhorsebackandspentthedayinthemountains.正确答案：taking题目:Thisdanceiswithyoungpeopleallovertheregion.正确答案：popular题目:Wehaventgotanynewsfromyou.Tellmewhatintheworldyouare?正确答案：upto题目:WhenhemovedtoCanada,thechildrentothechangeverywell.正确答案：adjusted题目:Whentalkingaboutthetrip,hewasvery.正确答案：ti

7、ringexcited题目:Letmehelpyougetthebooksback.正确答案：Imallset.Butthanksanyway.题目:HaveyoubeentoSydney?正确答案：No,butIhopetogotheresometimenextyear.题目:HowdoyoulikethefilmonTVlastnight?正确答案：Ireallyenjoyedit.题目:HowlonghaveyouworkedatNewWave?正确答案：Forabout5years.题目:IhearyouvebeentoTokyo.正确答案：Yes.Iwenttherelastmont

8、h.题目:Accordingtothepassage,whensuccessfullanguagelearnersmeetsomenewwords,theyusually.正确答案：trytoguesstheirmeanings题目:Successfullanguagelearnerswanttolearnthelanguagebecause.正确答案：theyhaveinterestinthelanguage题目:Successfullanguagelearningisactive,sosuccessfullearners.正确答案：lookforachancetousethelanguag

9、e题目:Whatisthepurposeofthispassage?正确答案：Tointroducesomeusefultechniquesoflanguagelearning.题目:Whichoneofthefollowingstatementsistrueaboutsuccessfullanguagelearnersaccordingtothepassage?正确答案：Theyusespecialtechniques.国开电大01878-综合英语(1)-Unit2单元练习答案题目:hegraduatedfromtheuniversity10yearsagoandstillkeptinwit

10、hseveralclassmates.a.touchb.trackc.searchd.line正确答案：touch题目:pleasejohnthatmyhouseisnotabouttofalldown.a.makesureb.surec.ensured.assure正确答案：assure题目:todaysnewspaper,weshallhavecoldweathernextweek.a.Withregardtob.Inspiteofc.Accordingtod.Insightof正确答案：Accordingto题目:theirearningsareintotheirskill.a.rank

11、portion正确答案：proportion题目:thehousegivesnoofhavingbeenoccupied.a.evidenceb.sightc.chanced.share正确答案：evidence题目:Themuseumhadseveralpaintingstheartistsearlystyle.a.respectingb.standingc.meaningd.representing正确答案：representing题目:useyourseatbelttothedangerofinjuryinanaccident.a.enlargeb.

12、shrinkc.decreased.increase正确答案：decrease题目:thenewbookwasthebiggestculturaloftheyear.a.thingb.eventc.matterd.fact正确答案：event题目:myoldersisterhastakenontheofwifeandmother.a.workb.jobc.occupationd.role正确答案：role题目:youwillnotmakeagoodteacher,unlessyoufeelteachingisyour.a.vocationb.vacationc.vacancyd.vigor正确

13、答案：vocation题目:manyofthestudentsareworkingtohelptheircollegetuition.a.chargeforb.payforc.bargainford.salefor正确答案：payfor题目:inthecountrysideihadsomeinterestingthatarememorableforme.a.expressionsb.expansionc.experiencesd.expenses正确答案：experiences题目:iwasridingmybicyclealongtheroadwhenacarme.a.overloadedb.

14、overlookedc.overtookd.overheard正确答案：overtook题目:somepeopleusetheirsuperiortogainanadvantage.a.ranksb.conditionsc.termsd.situations正确答案：ranks题目:thestandardofpeopleslifeshowsthattheireconomyis.a.sinkingb.droppingc.fallingd.declining正确答案：declining题目:,morethan70percentofthesurfaceofourplanetiscoveredbywa

15、ter.a.Overallb.Generallyc.Entirelyd.Ordinarily正确答案：Overall题目:myshirthassomuchafterwashingthaticantwearitanymore.a.declinedb.decreasedc.shrunkd.fallen正确答案：shrunk题目:cation正确答案：occupation题目:holdtheladderwhileistandon

16、it,orillfalloff.a.stuckb.steadyc.smoothd.slow正确答案：steady题目:ihavebeenwaitingforhimforthelasttwentyminutes,buthehasntyet.a.shownoffb.shownupc.shownthroughd.shownaround正确答案：shownup题目:anumberofoccupationstherisearelawyers,computeranalystsandpsychologists.a.atb.onc.ind.by正确答案：on题目:weweresurprisedatthenew

17、sthatpaulwasmarriedlucy.a.tob.byc.atd.with正确答案：to题目:billhasmuchexperiencesales,rd.forin正确答案：infor题目:hehasmuchexperienceanengineer.a.asb.atc.byd.for正确答案：as题目:thejobgavemeachancewiththescientistsintheirresearch.a.livingb.livec.tolived.lived正确答案：tolive题目:n

18、oagreementwasreachedinthediscussionasneithersidewouldgivewayto.a.theotherb.anotherc.anyotherd.other正确答案：theother题目:ididnotchooseanyoftheofferings,becauseifoundofthemsatisfactory.a.neitherb.noonec.ratherd.none正确答案：none题目:theybesleepingbecausethelightsareout.a.canb.mustc.shouldd.need正确答案：must题目:raysbe

19、eninthehairstylingbusiness20yearshegraduated.a.sinceforb.forsincec.sincesinced.forfor正确答案：forsince题目:theywantahouse,wewouldratherliveinaflat.a.asthoughb.althoughc.asd.whereas正确答案：whereas题目:whydontyoucomewithus?a.Yes,Ireallycantgowithyou.b.Idloveto,butIneedtogopickupthekids.c.Whendidyougotothatrestau

20、rant?正确答案：Idloveto,butIneedtogopickupthekids.题目:howdidyoumissyourtrain?a.Well,Iwascaughtinthetrafficjam.b.Whatsyouropinion?c.Dontworryaboutthat.正确答案：Well,Iwascaughtinthetrafficjam.题目:whatdoyoudoinseattle?a.Ididnothingbutstayedathome.b.Illvisitafriendofmine.c.Imatourguideinatravelagency.正确答案：Imatourg

21、uideinatravelagency.题目:areyoufreethisweekend?a.No,itcostsabout200yuan.b.Itshouldntbethatexpensive.c.Imnotsureyet.Maybenot.正确答案：Imnotsureyet.Maybenot.题目:haveyouvisitedhongkong?a.Sorry,ImplanningtogotoNewYork.b.No,butIvehearditsanexcitingcity.c.Yes,itsalongwaytomyhometown.正确答案：No,butIvehearditsanexcit

22、ingcity.题目:inamerica,.a.onedoesnotusebusinesscardsb.oneusesbusinesscardseverywherec.oneusesbusinesscardsbutnotasoftenasonedoesinAsiad.oneusesbusinesscardsmuchmoreoftenthanonedoesinAsia正确答案：oneusesbusinesscardsbutnotasoftenasonedoesinAsia题目:ifyouknowhowtohandlebusinesscards,youwill.a.beabsolutelysucc

23、essfulb.gethelpfromothersc.makeeverybodyhappyd.findtheknowledgehelpful正确答案：findtheknowledgehelpful题目:topolitelyrefusearequestforbusinesscards,youmaysaythefollowingexcept.a.Sorry,butIcantsatisfyyou.b.Sorry,butImafraidImalloutatthemoment.c.Iforgottobringthemwithme.d.Sorry,butIdonthaveabusinesscard.正确答

24、案：Sorry,butIcantsatisfyyou.题目:fromthepassagewecaninferthat.a.businesscardsarethekeytosuccessb.businesscardsshouldbebeautifullydesignedc.youshouldalwayscarryyourbusinesscardsd.handlingbusinesscardsskillfullyisimportant正确答案：handlingbusinesscardsskillfullyisimportant题目:theword“examine”(line1,para.5)isc

25、losestinmeaningto.a.searchforb.testc.lookatd.research正确答案：lookat国开电大01878-综合英语(1)-Unit3单元练习答案题目:therewasaintheshopwhenafirestarted.a.fantasyb.soundc.excitementd.panic正确答案：panic题目:buyingsobigahousewillafortune.a.takeb.spendc.maked.cost正确答案：cost题目:canyouprovideanyevidencethathewasofthecrime?a.typicalb

26、.bable正确答案：innocent题目:allthepeopleinthecountryhavetheseriousaccident.a.heardfromb.heardoutc.heardofd.heardin正确答案：heardof题目:thestoryintodaysnewspaperistoldfromdifferentpointsof.a.wayb.viewc.thoughtd.mind正确答案：view题目:thoughhewasdressedinworkingclothes,ihimatonce.a.realizedb.spott

27、edc.understoodd.considered正确答案：spotted题目:thistownisforitsbeautifulbuildings.a.famousb.unknownc.innocentd.different正确答案：famous题目:binesb.raisesc.heightensd.influences正确答案：influences题目:theyoungmanlivesinaworldofandrefusestherealfacts.a.appearanceb.fantasyc.mindd.exhibit正确答案：fantasy题目:,ilikehisliteraryw

28、orks,butmanypeopledonot.a.Generallyb.Publiclyc.Personallyd.Considerably正确答案：Personally题目:shemadeuphertostartherowncompany.a.brainb.mindc.idead.thought正确答案：mind题目:heknewhedidsomethingwrong.ashewaited,bined正确答案：heightened题目:ifyoudontwanttogetintodifficultsituation,youdbettersomemoney.a.riseb.arisec.ra

29、ised.steal正确答案：raise题目:ihaveheardtwooftheaccident,whicharedifferentfromyours.a.versionsb.translationsc.directionsd.techniques正确答案：versions题目:areyoutodohomeworkeveryday?a.supposedb.believedc.thoughtd.ought正确答案：supposed题目:ihaveseenallhisfilms,biningc.includingd.having正确答案：including题目:theywaitedintohea

30、rtheendofthestory.a.realismb.suspensec.dreamd.trouble正确答案：suspense题目:idontknowthenumberilllookinthetelephonebook.a.makesureb.assurec.ofsured.forsure正确答案：forsure题目:theboywillbepunishedifhegetsintoatschool.a.influenceb.appearancec.societyd.trouble正确答案：trouble题目:davidhasanewforcookingdeliciousmeatandfi

31、sh.a.techniqueb.agentc.influenced.experience正确答案：technique题目:itisbettertoaskhim_heshouldrefuse.a.eventhoughb.ifc.incased.until正确答案：eventhough题目:hementionedthefilm,thetitle_ismemorableforallofus.a.ofitb.ofwhichc.whichd.whose正确答案：ofwhich题目:when_,thetvsetwillbeimmediatelysenttoyourhouse.a.buyingb.tobuy

32、c.boughtd.buy正确答案：bought题目:not_hisphonenumber,theycouldntgetintouchwithhim.a.knownb.knewc.toknowd.knowing正确答案：knowing题目:i_thepicassoexhibityet.howaboutyou?a.didntvisitb.wasntvisitingc.hadntvisitedd.haventvisited正确答案：haventvisited题目:iwrotedownhistelephonenumber,sothati_rememberit.a.needb.hadtoc.might

33、d.must正确答案：might题目:thefilmsoonbecameknown_theworld.a.betweenb.amongc.duringd.throughout正确答案：throughout题目:itisawonderfulshowbased_traditionalmexicandances.a.onb.byc.withd.at正确答案：on题目:isthereanygoodfilm_channel8tonight?a.onb.inc.byd.for正确答案：on题目:myfriendsinbostoninvitedme_them.a.visitingb.tovisitc.vis

34、itd.visited正确答案：tovisit题目:haveagoodtimeonyourholiday！_a.Thankyou,andyoutoo.b.Thatsallright.c.Good.Whynot?正确答案：Thankyou,andyoutoo.题目:ivealwayswantedtoswiminthatlake._a.Whatdoyouthinkofthecoach?b.Really?Couldyoutellmewhy?c.Theweatherforecastsaysitisgoingtorainsoon.正确答案：Really?Couldyoutellmewhy?题目:ihea

35、ryouvegotanewhouse._a.Nonewsisgoodnews.b.Pleasetellmewhereitis.c.Yes.Ijustboughtitlastmonth.正确答案：Yes.Ijustboughtitlastmonth.题目:hi,peter!howwasyourtour?_a.Whydidntyoucomewithme?b.Ittookmeawholeweek.c.Oh,itwasreallyalotoffun.正确答案：Oh,itwasreallyalotoffun.题目:letmehelpyouopenthatbottle._a.Nevermind.Ihave

36、noideaaboutit.b.Thanks.Ireallyappreciateit.c.Thankyoufortellingmeaboutit正确答案：Thanks.Ireallyappreciateit.题目:ifyouarestayinginindia,youdbetter_.a.notuseyourlefthandtopassfoodatthetableb.useyourlefthandtopassfoodatthetablec.notuseyourlefthandtowashyourselfd.useyourlefthandatalltimes正确答案：notuseyourlefth

37、andtopassfoodatthetable题目:toshakeyourheadmeans“yes”_.a.inIndiab.inEuropec.inBulgariad.inThailand正确答案：inBulgaria题目:youcaneasilymakeathailanderangryby_.a.touchinghisheadb.crossingyourlegswhiletalkingtohimc.shakingyourheadd.noddingyourhead正确答案：crossingyourlegswhiletalkingtohim题目:thewriterthinksthattokn

38、owaboutacountrywellonemust_.a.knowthelanguageofthecountryb.knowthemannersofthecountryc.knowthemannersbetterthanthelanguaged.knowboththelanguageandthemanners正确答案：knowboththelanguageandthemanners题目:wecanlearnfromthepassagethat_.a.differentcountrieshavedifferentmannersb.themannersinThailandarethesameas

39、thoseinIndiac.oneshouldbecarefulnottocrosslegsinEuroped.oneshouldnottouchagrown-upsheadinIndia正确答案：differentcountrieshavedifferentmanners国开电大01878-综合英语(1)-Unit4单元练习答案题目:he_withtheviewaroundassoonashewasatthetopofthehill.a.felluponb.fellinlovec.fellbehindd.fellin正确答案：fellinlove题目:theperformancewassob

40、oringthatsomeoftheaudience_asleep.a.hadb.tookc.felld.got正确答案：fell题目:thedogwentinthewaterandnowitswet_.a.allthereb.alloutc.alloverd.allthrough正确答案：allover题目:haveyou_whatjobyouaregoingtodo?a.thoughtaboutb.believedinc.takencared.consideredabout正确答案：thoughtabout题目:perhapsthissweaterwillfityouifyou_itabi

41、t.a.expandb.increasec.enlarged.stretch正确答案：stretch题目:mynewwaytosolvetheproblemisnotexactlysame,but_theoneyouhave.a.likeb.alikec.similartod.sameto正确答案：similarto题目:the_amongthetwopartieswasblownupbythenewspapers.a.controversyb.settlementc.controld.decision正确答案：controversy题目:thisisagoodcopyofthepaintin

42、g.the_isinthenationalgallery.a.earlierb.previousc.formerd.original正确答案：original题目:itisjohnwhofirst_withthegoodideaofgoingtovisitthemuseum.a.cameacrossb.cameafterc.camedownd.cameup正确答案：cameup题目:shecouldnot_adecisionaboutwhattowearintheparty.a.dob.makec.arrived.decide正确答案：make题目:thisscientisthasbeen_t

43、hisproblemforabouttenyears.a.workingoutb.workingonc.workingoffd.workingup正确答案：workingon题目:whilestandinginlineforthefootballmatchticketswe_aconversation.a.workedupb.madeupc.struckupd.pickedup正确答案：struckup题目:theideatotravelbybikebeganto_inhismind.a.moldb.formc.maked.build正确答案：form题目:haveyou_alltheexpe

44、nsesofmovinghouse?a.tookoutb.putoutc.figuredoutd.turnedout正确答案：figuredout题目:thelettersweresenttohim_abigparcel.a.alongwithb.allalongc.afteralld.allover正确答案：alongwith题目:thestatueinthesmalltown_backto1870s.a.catchesb.getsc.returnsd.dates正确答案：dates题目:wecan_meatintinssothatitdoesnotgobad.a.pressb.preser

45、vec.presentd.pray正确答案：preserve题目:thesignx_anunknownnumber.a.standsforb.takesplaceofc.standsbyd.looksup正确答案：standsfor题目:they_himstealingthepublicproperty.a.discoveredb.recoveredc.uncoveredd.covered正确答案：discovered题目:itshardtogetawordout_them.a.fromb.inc.atd.of正确答案：of题目:atfirsthefound_whathewantedto.a.

46、thatithardtodob.ithardtodoc.hardtodod.todoit正确答案：ithardtodo题目:heistheman_isupposewascapableofdoingsuchathing.a.whob.towhomc.ofthemd.whom正确答案：who题目:somemembersofthestaffcouldnthandlethecondition,hard_theytried.a.whenb.althoughc.asd.evenif正确答案：as题目:itwasnotuntilhearrivedatthestation_herealizedthatheha

47、dforgottenhisticket.a.beforeb.thatc.whend.after正确答案：that题目:wedontdoubt_hecandoagoodjobofit.a.thatb.whetherc.ifd.about正确答案：that题目:ihaveheardbothteachersandstudents_wellofhim.a.tospeakb.spokenc.tohavespokend.speak正确答案：speak题目:hemovedawayfromhisparents,andmissedthemenjoytheexcitinglifeinnewyork.a.toomu

48、chtob.enoughtoc.verymuchtod.muchsoasto正确答案：toomuchto题目:iboughtanewhouselastyear,buti_myoldhouseyet.a.didnotsellb.havenotsoldc.hadnotsoldd.donotsell正确答案：havenotsold题目:_mightbeexpected,theresponsetothequestionwasverymixed.a.Itb.Thatc.Asd.What正确答案：As题目:ivestartedmyowncomputercompany._a.Nokidding!Congra

49、tulations!b.IfIhadthemoney,Idbuyitc.Couldyoutellmewhoownsit?正确答案：Nokidding!Congratulations!题目:doyouliveinchicagonow?_a.Chicagoisabusyandnoisycity.b.Chicagoisfarawayfromhere.c.Well,Imthinkingofmovinghere.正确答案：Well,Imthinkingofmovinghere.题目:tellme,whatsnewwithyou?_a.Iveboughtanewcar.b.Itsonthefilmchan

50、nelat20:30.c.Yes,itsreallyinteresting.正确答案：Iveboughtanewcar.题目:mayigiveyouahand?_a.Howmanyhandsdoyouhave?b.Thankyou.Youaresokind.c.Idontneedaliftnowadays.正确答案：Thankyou.Youaresokind.题目:ivegot2ticketsforthematch.wouldyouliketogowithme?_a.Howaboutthematchlastnight?b.Thematchmustbeexciting.c.Whynot?Lets

51、gotogether.正确答案：Whynot?Letsgotogether.题目:theoriginoflanguageis_.a.clearlyexplainedinthispassageb.amatterthatcannotbeorhasnotbeenexplainedorunderstoodc.aquestionthatwasdifficulttoanswerd.aproblemalreadysolved正确答案：amatterthatcannotbeorhasnotbeenexplainedorunderstood题目:oneofthereasonswhymeninventedcert

52、ainsoundstoexpressthoughtsandactionswasthattheycould_binethem正确答案：makethemselvesunderstandeachother题目:whatistrueaboutthewords?a.Theyareusedtoexpressfeelingonlyb.Theycantbewrittendownc.Theyarespokenorwrittensoundsd.Theyaresoundlesssigns正确答案：Theyarespokenorwrittensounds题目:agreatwriterisonewho_.a.hasgr

53、eatthoughtsb.isgoodatdeeplyimpressinguswiththepowerofcorrectwordsc.iscarefulinchoosingcorrectwordsd.bothAandB正确答案：bothAandB题目:itisnecessarytochooseourwordscarefullywhenwespeakorwriteinorder_.a.toshowthatwearepoliteb.toshowthatwearegoodatusingthemc.toexpressexactlywhatwemeand.toprovethatwearenotsilly

54、正确答案：toexpressexactlywhatwemean国开电大01878-综合英语(1)-Unit5单元练习答案题目:canyoutellmewhichplaceyou?a.haveoutofmindb.haveinmindc.thinkoverd.haveinthemind正确答案：haveinmind题目:donttrytodoeverythingatonce;takeitabit.a.atothertimesb.attimesc.atthetimed.atatime正确答案：atatime题目:doyouanywaytogetthedirtystainsoutofthecoat?

55、a.knowofb.makesurec.askford.hearfrom正确答案：knowof题目:,heknewnothingaboutit.a.Asamatteroffactb.Inafactc.Asmatteroffactd.Asafact正确答案：Asamatteroffact题目:hesstillthecityalthoughhelivedthereabout10yearsago.a.familiarwithb.innocentofc.familiartod.famousfor正确答案：familiarwith题目:theyoungboyfivedollarsandgaveittot

56、heshopassistant.a.countedoutb.counteduptoc.counteddownd.countedon正确答案：countedout题目:whenheheardthenews,hestartedpacinginthegarden.a.inandoutb.forthandbackc.upanddownd.insideout正确答案：upanddown题目:wewhatyouhavedoneforthedevelopmentofthecompany.a.appraiseb.appreciatec.apprehendd.approach正确答案：appreciate题目:

57、marysangandiheronthepiano.a.accompaniedb.accordedc.accomplishedd.accounted正确答案：accompanied题目:canyouwhathemeansbysayingthat?a.makeupb.putoutc.makeoutd.talkabout正确答案：makeout题目:whichdoyoumosthealthorwealth?a.thinkb.believec.considerd.value正确答案：value题目:ver

58、blem正确答案：proverb题目:hegainedexperienceofsailingasadeckhand.a.powerfulb.practicalc.presentd.private正确答案：practical题目:isawherwalkinginthecourtyard.a.downandupb.backandfrontc.inandoutd.backandforth正确答案：backandforth题目:ikickedmyselffornothavingitearlier.a.thinkoverb.thoughtofc.thoughtoverd

59、.thinkof正确答案：thoughtof题目:iwasquiteallofthesedifficultiesbeforewestarteddoingit.a.alongwithb.awareofc.usedwithd.happyto正确答案：awareof题目:canyouagoodmagazinetoreadwhileitravel?a.recordb.recoverc.recognized.recommend正确答案：recommend题目:hehisfeetbeforeheenteredtheroom.a.wipedb.weltedc.rubd.wired正确答案：wiped题目:w

60、hen,beforeyoustartameal,youwillbegivenabasketwithahottowelinit.a.diningoutb.youdiningoutc.dinedoutd.dineout正确答案：diningout题目:youwillfindriceateverymealinthesouthofchina.a.servingb.beservedc.servesd.served正确答案：served题目:thiskindofserviceisthenicest，itsalsothemostexpensive.a.sob.andc.butd.however正确答案：bu