定語從句和名詞性從句習(xí)題

學(xué)習(xí)必備

歡迎下載定語從句翻譯練習(xí)1.我們在醫(yī)院一直照顧takecareof的老太太死了.你想娶marry的姑娘昨天偷了我的錢包孫老師寫的書是世界上最好的書。你喜歡的科目就是我喜歡的科目。昨天被我家的狗咬的人bite天又被你家狗咬了。你知道他遲到的原因嗎？我討厭hate住過的那個旅館。我永遠(yuǎn)也忘不了我們共同生活和學(xué)習(xí)的那個秋天她是我見過的最聰明漂亮的小孩。有什么事我能幫你嗎？昨天死的那個老人留下了萬美圓。昨天那個醫(yī)生告訴我他為我爹什么也做不了了。這就是你能在上面找到答案的那一頁.正像老師昨天說的那樣，他沒有通過考試。正像我們剛才討論的那樣，學(xué)習(xí)英語很容易。正像你知道的那樣錢是非常重要的。我們現(xiàn)在學(xué)的商務(wù)英語非常有用。22.你認(rèn)識那個警察一直在找的小偷嗎？自從他出生以來他就從未見過她爸爸。她昨天告訴我，自從他去年見到她父親，就再也沒有見過了。學(xué)習(xí)必備

歡迎下載1.Theoldladywhomwehadtakencareofinthehospitallastyeardied.2.Thegirlwhomyouwanttomarrystoleyourwalletyesterday.ThebookthatMt.Sunwroteisthebestbookintheworld.ThegirlwhoyoulikeisthegirlwhoIlike.Themanwhowasbitbymydogwasbitbymydogtodayagain.Doyouknowthereasonforwhichheisgoingtomarryyou?Doyouknowthereasonwhyheisgoingtomarryyou?7.IhatethehotelwhereIlived.IhatethehotelinwhichIlived.IhatethehotelIlivedin.8.IwillneverforgettheautumnwhenIstudiedandlivedwithyou.IwillneverforgettheautumninwhichIstudiedandlivedwithyou.9.Thegirlwhomhehadlovedfor20yearsmarriedsomeoneyesterday.10.SheisthebeautifulgirlthatIhaveeverseen.IsthereanythingthatIcandoforyou?Theoldladywhodiedyesterdayleftonemillion.Thedoctortoldmeyesterdaythatthereisnothingthathecoulddoformyfather.Thisisthepage,whereyoucanfindtheanswer.Thisisthepage,whichyoucanfindtheansweron.Astheteachertoldmeyesterday,hedidn’tpasstheexam.Aswewasdiscussingjustnow,it’seasyforustostudyAsmymothertoldme,mygirlfrienddidn’tlovemeatall.Asyouknow,themoneyisveryimportant.WearestudyingthebusinessEnglish,whichisveryusefulforusInthefuture.Doyouknowthereasonwhyyourdogisgoingtodie?Sheisthegirlwhowillhavemadetenthousanddollarsbytheendofnestyear.Doyouknowthethiefwhom(who)thepolicemanhasbeenlookingfor?Yesterday,Hetoldmewhohadeatenmyapplewhichmymotherboughtforme.Shehasneverseenherfathersincehewasborn.Yesterday,shetoldmethatshehadneverseenherfathersineshewasbornDoyouknowthegirlwho(whom)yourmonitorlikes?高一英語名詞性從句專項練習(xí)（一）學(xué)習(xí)必備．doesnothingtodowithwhateverB.NowhatC.ThatIf

歡迎下載managercameandaskedthecustomerhow____didtheaboutB.thequarrelcomeC.comeD.hadcomethingwork..B.somethingC.anythingD.thatInformationhasputforwardmiddlegraduateswilladmittedintouniversities.whilethatD.shenzhouVSpaceshipinwhichC.whereD.Theyhavenoatall____.wherewheredidheC.placegoneheThedoctordidlottoreducethepatientfear____hewouldthedisease.whichwhichofthatordercame____thevillagethenextmorning.leavethat;shouldleaveC./;mustD.leavenopossibility____BobcanwinfirstprizeinthethatB.It;there;D.It;whether10.upatthemeeting_____enoughmoneyforourresearch.thatwhichC.whetherif11.saidtrue?thatwhatwhy12.____themeetingshouldlasttwoorthreedaysdoesnThatWhetherC.IfWhere學(xué)習(xí)必備

歡迎下載13.Itbit_____herturningwhileB.ifC.D.for_____morecountriesuseintheseen.D.If____hewillgoworkvillagesurprisesallus.WhatThatD.If16.____youdonlikehimisnoneofbusiness.WhatThatC.WhoHowtheinventionsincommonissucceeded.What;whatB.C.what;;what18.____appearedthathefoodWhatItC.AllD.That19.Itiswidely______thatsmokingbelievedB.thinksayD.hoped20.theaccidentcompleteWhatB.C.HowWhereKeys:—5611BBCAB20passedtestwillprizeWhoeverC.WhomeverWhotruethatthewillgivelectureweek?ABitDhe24.Ithasnotbeen___willforwhenBwhyD25.Obviously___wedothatdoif;what;does學(xué)習(xí)必備Itisall

歡迎下載Athat;Bwhat;whatCwhich;Dthat;介練(一、填適的詞Mid-AutumnDaycomes____SeptemberorOctober.youverymuch___askingMary'sThefarmersallbusynextA:youlike____andmilk,Hui?B:Ohno!likeChinese____nothinginit,Pleaseline____AandB.window,Icouldabigtreethehaslivedin1982.youwhatareworking________thehill.Zhangcome(三、選擇空(30分分Afishcan'tlive____water.inwithouttable____theofinB.toC.atonMrsGreenhaslivedLondonyears.forB.in,sinceC.forD.ChristmasDay___December25.B.oninD.byMyteacheroftenhelpsme____English,help,Ihaveupwith,withB.with,with,withwith,toD.with書店)____thesideofstreet.inB.C.forD.isfull____aboutofC.withD.____home,Ioldofmine.InBysunriseseastgoesdown____inB.on,onfrom,fromD.at,at10.isnohole(洞)____wall.onin11.laydownaunderB.C.D.12.Heapairofglasseshisnose.onC.under13.planehasflownhead.onB.D.at14.willaclass____Friday學(xué)習(xí)必備

歡迎下載inC.D.for15.isarailway____thesetwocities.amongC.in16.willtotalk____Britishhistory.B.onC.by17.Iback____anafterB.inforto18.TheylearnedthousandEnglish____oflastB.inC.by19.orwe'lllate____B.ofC.tofor20.____allthestars,thetheearth.OfB.InWith21.flowersinfrontB.inthefrontoffrontD.front22.____.yearatJuneJune14that10inyear1980inyear1980onJuneD.at10a.m.onJune14thinthe198023.isa____river.onatbelow24.otherdaytheman____therivertosavechild.inB.C.on25.littlegirlabeautifulbird____tree.oninC.intoD.26.Apoor____mecouldn'tgoinaboutonlike27.He____Shanghai____10:00.inon,on,D.28.ItisverykindyougiveofforC.fromD.with29.TheyweretalkingfilmImetthem.towithD.30.Nothingtooifheart____inB.C.intoD.to(八、閱下短掌握大,然用當(dāng)介填(10分,分WhatIsaLibrary?Aisa收集books.Iffiftyorsixtythisisyourlibrary.Aisabuildinglargearelibrariesgrown-ups(成年人)andlibrarieschildren.booksreadthere.must,oftake學(xué)習(xí)必備

歡迎下載backthelibrarythemWethreebooksaandthemtwoIfwehavenotfinishedatwowethelibrarysayrenewitatime.Mosthavereadingtherearecansitaandreadanewspaper,magazineabook.thethere詩)(游記)andscience.Therealsonovels小說magazinesinfor,on3.for4.with,with7.forupDA3.4.BBBB9.A(八)、1.of6.for7.for12.by/14.to16.In/被語練

10.10.B5.in20.offlowersweresolovely______in海南卷B.beensoldweresoldsellwillgiveusWesternculture,butwhere_____A.hasn’tbeendecidedB.haven’tC.isn’tbeingdecidedD.decidedItthattheearly______forandeducation.beingB.C.havebeenhavedesignedAlthoughthecausesofdonothaveanypreventbeinguncoveredB.havebeenuncoveringC.uncoveringD.uncoveredof’worthofbyawhichacrossthenorthofEnglandhasbeenB.beencausedC.willcausedD.willbeencausedMonthstenthousandsea,which______Pacific,andwenocalledC.beencalledbeencalledmomenttheOlympicGamesopen,theworldcheered.B.beendeclaredC.haveD.學(xué)習(xí)必備

歡迎下載Whydidyouleave—I______abetterIBM.offeredC.amD.offered—gotweek.Didgowedding?—No,IabignotinvitedB.havenotbeeninvitedC.’tbeeninvitedD.invite10.herodifferentlyinnews－全)wasC.reports11.IthatthetillputoffB.willputoffC.beenoffD.isoff12.—Isawinsupermarket—Really?HearoundherelongA.beB.wasneenC.hasn’tbeenseenD.hadn’tbeenseen13.—ItsaidthatBeijingOlympicticketscan_____April,2007.—Yes,andIamhurdleswillwell.bebooked;soldbook;soldC.booked;D.14.Itiscoins_____underearthabout500bythetimewerehadburiedbeenburiedC.wereburied15.Peopletemple_____byB.C.willhavebeenis參考答案6-10BDDCA11-151.“Inevereatmeat.heHe____________meat.2.“I’vefoundwallet.hesaidtome.Heme______wallet.3.“Itookithomeme.”shesaid._______itwith4.teachersunrisesthegoesdowninthewest.”Thesaidthattheineastinthewest.5.“Imetyesterday.hesaidtome.Heme6.herebeforefive.hesaid.HeIgo學(xué)習(xí)必備

歡迎下載7.“Iboughtthehouse10yearsago.hesaid.Hehe_______thehouse_______.8.youseeherweek?”hesaid.He______Ihadseenherthe_______.9.Hesaid,“Youcansithere,”HeJimthatthere10.Heasked,“Howyoufindit,mother?Hehermother__________________found11.“Wherehaveyouthesedays?heasked.Heme_______days.12.“Doyouknowwhereshelives?”heasked.He13.“Stopmakingsomuchnoise,children.”said.Hechildren______makingnoise.14.’ttellhimthenews.”shesaid.toldme_____________him15.“Areyouintestedthis?”hesaid.He______Iin______.【參考答案】atetaken4.rise,goestold,had,6.therehad,asked,if[whether],told,11.I,12.if[whether],I,13.stoptell15.if[whether],thatNotuntilIwork____howIwasted.didn'tIrealizeB.didIrealizeC.Ididn'trealizeD.Ibyafewdaymasterlanguage.canC.willwillIfdon'tgo，IdoIIIshallNo____totheleft.hadIgotwhenIgot，thanC.I，didI，when——Yourfatherverystrictwithneverletsoffsingleofours.heB.SoisC.So____，thereheleaveB.WasheC.WerehetoleaveIfheleaveNeverin____IhaveseenIheardseen學(xué)習(xí)必備

歡迎下載IhaveseendidIhearorsee—Here____WhereisXiao？There____.comesbus，hecomes，thecomesishethecomeshe____，Iwillit.asIlikeitIlikeitasIlikeitIlikeit10.—Ilikefootball.Idon'tlikevolleyball.doINeitherdoIC.Soitiswithitwith11._____the，I_____toItaly.Ifitwere，itnot，wouldWeren'titfor，willIfitbeenhave12.So_____indidn'tdaretohefrightenedwasfrightenedhehe13.—Inmodem，girlslike_____and.Afterall,hasgreatlyimproved.so，soyousodoyoudoso，youso，do14.—YouanEnglishclassdayexceptSunday.weB.SohaveD.doweIwonderifyourwifewillball.Ifwife_____，so_____mine.doeswillB.will，will，wouldD.doesdoOnlyItextagain_____itsmainthatIknewdidIcouldknowD.Iknow17.—YoutohaveallEnglishbylB.SodolC.ID.haveI18.—ITV，butlistentolot.學(xué)習(xí)必備

歡迎下載doINeitherdoIImthesameSoitwithme19.Soexcited_____thathecouldn'taheB.didseemC.wasD.did20.Jimmynervousaword_____downintheheB.wasC.he21.Little______tooktripwhereithaveIB.Iknowndo1D.didIknow22.—youseenlikethatbefore？，IneverhaveseenanythinglikeNo，IhaveseenlikethatNo，seenlikethat，Iseenlikethat23._____，theinvitationgoWereIB.WasIC.IyouD.1be24.andneithershouldIB.soshouldIIandsoI25._____caughtmouse.catjumpedB.ThecatjumpedC.thecatD.Jumpedcat26.only_____a，alsoit.didhemakeB.C.hemakehe27.uncleaworkerhasbeenworkinginfactoryformorethanyears._____.ishisaunthisauntdoesitiswithhisaunt28.once_____theirdidchangeB.theytheyD.29.—Doknowwithhisbrother？Iand______.don'tIcareIIcareneitherIcare30.untilhome_____findthatthiswalletdid31.—oneoftreesintheaNeverIhaveIseenNeverIIhavenever32.Nowhereelseinworld_____cheapertailoring（裁縫業(yè)，衣業(yè)）inHongatouristcanfindafind學(xué)習(xí)必備atouristwillatouristfound33._____indoingOnlybyworkinghardwecanByonlyworkinghardwecanOnlywebyworkingOnlybyworkinghardcan34._____allwent，lyinginsun.wasweatherwasThewasweathertine35.____anicemanthatweallbelieve，didhe，heseemedSuchseemedSuch，didseem36.—seeman

歡迎下載.IhaveplayedmanyinlotofdoIISoID.Iam37.onlyworking，also____verypolite.is，B.is，C.theboy，isisboy，ishe38.____，nevertodotheTryhedoesB.hetriesC.TryasAstryhe39.—Iseepicturewellfromhere.NeithercantINeitherIIneitherD.NeithercanI40.—YougivenwhocaredIoughtSoitD.Idid41.SoalmostkilledheB.doeshedriveC.diddrivehedrove42.Littleaboutwasveryill.hecaredB.didcareC.D.doescare43.WellknowhimwellknowIdid，didB.didI，heC.didI，heD.I，didhe44.No____intothestreet.didhearnewsthandidhearnewswhenheardnewsthanheardnewswhen45.Littlewonder_____indismay.havesome學(xué)習(xí)必備

歡迎下載thrownthrownthrownsome46.____，haveIfwereIfhestudiedhardhe47.werelucky，fornosooner__________itwereturnedwehadreturned，whendidreturn，than48.Solittle_____agreeonthattheydidB.diddid49._____herealizeditreturnhome.sooneritgrewthanHardlydiditgrowwhenItuntilthatItuntilthat參考答案1~516~20BADBCDCABC26~30ADABACBDAD36~4041~4546~49CDAC主謂一致練習(xí)題old____welllookedgovernmentinarebeenD.secretarymanager____verynow.C.wasweremanagertomeeting.B.C.D.wasTomaswelltwoofhisclassmatestowereC.beenbeen5.EitheryouI_____goingtoteachers‘officeafterclass.amB.isC.willMostofhissparetime____spentinC.D.oneofbestthatthisyear.hashadhavethousand_____quitelargesum.A.areisC.wereD.have20oftheworkisC.were學(xué)習(xí)必備

歡迎下載10.Mr，togetherwith，A.arehasC.11.It____Iwho_____leavingA.isB.am…isC.is…amD.am…amNotonlyTombuthiswife____fondoftelevision.C.D.wherenewnotB.decidedC.notD.not14.Althoughthebookeasy，areisbeenThattheyinthesematterstoall.B.arewereHalfgoods____stolenday.C.is17.Mathematicslanguageofscience.aregoingC.is18.of_____Chinese-EnglishhaveB.thereisthereare19.TheyhaveB.thereisthereare20.thetreesbuilding.standB.C.standing21.This____madeinC.beenD.had22.Nomyparents_____anythingit.C.isknowinghaveknown23.Anumberof_____fromtheisC.have24.thenorthA.areisC.haveD.25.Writing_____whatIenjoymostC.wasD.were26.His“SelectedPoems”_____firstpublishedin1965.B.hasbeenare27.isfriendofA.‘s’sB.Mary‘s學(xué)習(xí)必備

歡迎下載C.’sofMaryD.Mary‘s28.Aof____spenthaveB.C.havebeen29.thewall_____hangshanged30.greeninLeafB.C.31.Fatherfor____abouthistrouble.anB.C.advicesthe32.AllbutoneC.beenwere33.peopleinvited_____fifty，them_____absentfordifferentreasons.A.were；；；；34.inbig_____verydirtybyoftenC.have35.Nobodyintheallowallowedallowed36._____hard-workingisC.beenD.arebeing37.done_____beenAllAllthat；All；Allthat；has38.twobrothers，either____outofworknow.D.39.everywherehesuddenlyintheatre.forB.forC.forwere40.ApplesofthistastesgoodB.wellgoodD.taste41.，musthave_____washed.is；itB.；itC.；themD.isthem42.Where，thereflies.areB.thereC.therehas43.OlympicGameseveryis；fourB.；fourC.isfiveD.；five44.Manya_____tous.havehasC.is45.Heistheonly_____elected.C.has46.Three-fourthsofthehomework_____today.B.hasbeenfinishedC.haveD.havefinished47.____in____compositions，handtheminthis學(xué)習(xí)必備

歡迎下載hasnt；his’handedhandedtheirD.；48.isoneofbeststudentsinclasswho_____byteacher.praisedB.ispraisedC.praised49.whole_____theteacherlisteninglisteningC.listeningislistening50.UnitedofAmericaofmostcountriesintheareC.were：BABAACDBDB16-20BCBABABABA31-35BDCBCADBBCCBBBD46-50BBAAA賓語補足練習(xí)題managerwouldlikeseecarryoutcarryingC.carriedoutD.tocarryout

thenext’sainyourbag.Iknow,’mgoingto_____.mendC.D.tohehadoftenmadewasmadebycryB.cryD.cry;allowacrosstoB.riskingforrisktoD.riskgoingIfoundthedoor_____Igothome.openedB.openboywantedridehisinthestreet,butmothertoldhim___.toB.notdonotdoD.to7.couldn’tdomyhomeworkwiththatnoise____.onB.goesonC.wentonD.togoWithlotofproblems_____,havingsettledB.settlingtosettledIadvised_____startingB.himtoto學(xué)習(xí)必備

歡迎下載10.IputhandhisIcouldheartbeatB.bebeatingbeatingwas11.hadbettertooth.pullouttopulloutC.out12.HemanagedtomakehimselfwithEnglish.understand;breakingbrokenC.breakingD.understood;13.askedhimwound______.exposeexposedC.D.14.Theytheservice____electricintheofficeinstalltoinstalltobeinstalledD.15.Afterfewtalks,bothterritorydispute______.settledB.settledC.hadsettled16.willseeproduct____whereveryougo.tobeadvertisedC.advertiseadvertising17.remarks_____realpurpose.wondertowonderD.wondering18.IcaughtmeIthingsandstarteddealinganothershop.cheattocheattobecheatinghehadoftenmadewasmadebyhiscrycrying;cryingC.cry;cryD.tocry;cryDidyouintendusnewTheencouragedgoodWritingB.C.D.iswriting22.boywantedridehisinthestreet,butmothertoldhim___________.toB.tonotitdonotto23.Mrs.Browndisappointedmachineshehadhad_______wentwrong學(xué)習(xí)必備

歡迎下載A.itB.itrepairedCD.torepairedWithlotofproblems_____,—electedishavingaA.settledB.toD.settledWithtrees,takenanewlook.plantedC.Dplantedwasseecareof.taketakenD.takingTheresultofwasthepublicuntillastB.knowntoD.tobeIcanmakeyou_____whatIsay,butyoucan’tmakeyourself____inEnglish.understandB.understand,Cunderstand,understandD.to29.Hethematatable_____.playtoplaychessC.seated;playingplaychess30.outinahurry,door_____.leaving;unlockedB.C.left;to31.pleasedtoseeproblem___soquickly.settledsettlingC.besettledhavingsettled32.Iwind___onmyfaceopenABtobeblowingD33.____upby60%,thehasyear.AsForWithD.34.____,leftsupermarketwithsatisfaction.B.For,buyD35.leavewaterwhilebrushyourteeth.runB.runningruntorun36.Hearoundand___intopocketB.toputtingC.D.學(xué)習(xí)必備

歡迎下載Lawsthatpunishparentsfortheirchildren’sactionsagainstlawsparents_______.worryC.worryingworryThe_____noise.A.don’tmake

makeC.notmakingnotto39.Anspokesmanstressedthatbeen____clearwarningsanyshots.toissueB.issuedC.toissuedD.toissued－Goodmorning.CanIhelpyou?－I'dliketohavepackage__beweighedB.toweighedC.weighD.weighed41.Fatherwillnot__ustorecorders.havelet.agreeD.allow42.wasmadetruckforaAwashB.C.tobe43.wereseen__river.playingbeplayingC.D.toplay44.Paulhave__worksB.learnC.learnedlearning45.Seeingthe__abovesurfaceoftheajoy.toriseraiseC.risingD.raising46.IdisappointedfindhisAdowndownC.downD.toturndown47.was____oilyfoodtheoperation.toeattoeatingC.nottoDnot48.speakerraisedvoicebutstillcouldnmakeherself_______.hearB.hearingC.D.heardIfyougotoXi’an,you’llfindpalacesmagnificentthancommonly_________.B.tosupposesupposedsuppose’ssocoldtoday,wemustkeepthe________.toburningD.51.motherlet________TVevery學(xué)習(xí)必備

歡迎下載to;watchB.notto;C.not;watchD.watching52.didnobserveher_______eC.comeD.53.Howaboutthetwoof____awalkthegarden?toB.takeC.54.Ihadmybike

,and’mgoingtohavesomebody

myradiorepair;B.repairing;tobeC.torepairing55.room,thenursefoundthetaperecorder.Entering;B.Entering;C.TobeingD.Havingentered;56.Couldyoushowmobilephoneyou’dlike______?toB.repairingitC.havingitrepairedtoit57.IheardtheABCIheardAlicetobesung;singB.sangsung;sang;singing58.I__________acrosstheAtlanticinfivesailsailD.sailed59.had______yournewly-boughtflat?Notyet.Igoingdesignforittodecorate;B.makeC.makeD.make60.“Didyouanydifficultytodayhomework?“No,infactIfound__________.”itveryeasytoitdoneC.veryeasyfordoingD.doitKeys:CCAADAACBC11-15CACAB26-30CBBCAA36-40DBCDCB51-55AACCBACCDAUnit2Grammar一

教學(xué)目：學(xué)習(xí)必備掌握由特殊疑問詞引導(dǎo)的名詞性從句在不同語境中正確運用特殊疑問詞。正確區(qū)分同位語從句和定語從句二教學(xué)程回顧

歡迎下載名詞性從句是一個句子其作用相當(dāng)于____詞，在主從合句中可充當(dāng)幾種成______,______,_______和__________名詞性從句可分四大類。EX.FindtheclausestellthefunctionofIamEnglish.()ThatIaofyouall)IttoyouthatIaof)factthatIisknowntoyouall.()Iamyoucandowellinthe()Iworriedaboutisyoudowellinthe)ConjunctionsofNoun連接詞連接代詞連接副詞

that,whether,if,（不充當(dāng)成分）whoever,（在從句中充當(dāng)主語_______,_________,_______）when,where,how,（在從句中充當(dāng)狀語byQuestion合并句子，并說出合并后的主從復(fù)合句中含有什么從句。1.Whathe?Hiswas____________________surprisedclause______從)What’syourfirstimpressionhim?Iwanttoknow.Iwant(objectclause_____從句canIalessonisquestion.Myquestionis______從)PeterrespondInoIhaveclause________句)注意：特殊疑問詞后的名詞性從句要用________語序主+++其他）名詞性從句中特殊疑問詞不可省略。EX.Checksentencesorfalse:他是怎么成功的仍然是個謎。hesuccessfulstillapuzzle.()hewassuccessfulisstillpuzzle.()你能告訴我他住在什么地方嗎？youtellmethewithme.()學(xué)習(xí)必備

歡迎下載youtellmewithme.()練習(xí)：Filltheblanksusing“that/whether/where/how/whenIhaveno_________from.________gotmoneyisstillHegaveus________weshouldupearlierexercise.Ihave________willwin.Ihavedoubt________willwin.thingmeistoforEurope.importantofnounI.同語從句和定語從句的區(qū)別:定語從句是_______的修飾語，對先行詞起______和______的作用可翻譯成“的”，關(guān)系詞在從句中不僅起連接作用，而且充當(dāng)______或賓語。同位語從句對名詞的內(nèi)容作進一步的_______和_表明名詞的具體內(nèi)容。連接that在同位語從句中不做任何成分只起連接作用,無體含義,且不可_______.Attributivethathad)thatwouldcomeagain.()練習(xí)：isdo