2021-2022學年河南省商丘市成考專升本英語自考測試卷(含答案)

2021-2022學年河南省商丘市成考專升本英語自考測試卷(含答案)學校:________班級:________姓名:________考號:________

一、單選題(20題)1.NotonlyIbutalsoTomandMary______fondofcollectingstamps.

A.amB.willC.areD.have

2.-Betweenthetwopossibleplans,I‘mbound_____thesecondoneA.favouringB.tofavourC.forfavouringD.tofavouring

3.______hecome,theproblemwouldbesettled.

A.WouldB.ShouldC.ShallD.If

4.Mary，_________here——everybodyelse，staywhereyouare．

A.comeB.comesC.tocomeD.coming

5.WewereoverjoyedatthenewsofChina__________anotherman-madesatel1ite．A.startingB.1aunchingC.fightingD.shouting

6.12．Itwasthetraining_______hehadatschool_______madehimagoodjumper．

A.what;whatB.that;thatC.what;thatD.that;had

7.Balloonsfloatintheair_________boatsdoonthesea.A.justasB.whenC.thatD.where

8.—That'smewhenIgotmarried.SeewhatIlooklikenow!—Whynotgoonadiettogetinto______?

A.shapeB.formC.appearanceD.body

9.Thescientistsallagreedthatrulesofphysics,______weareallfamiliar,governtheworldA.towhichB.onwhichC.whichD.withwhich

10.Iwonderedwhatdifficultyhehad_________theplan?

A.tocarryout

B.carryingout

C.carriedout

D.withcarryingout

11.Sobadly______inthecaraccidentthathehadtostayinhospitalforseveralweeks.

A.didheinjureB.heinjureC.washeinjuredD.hewasinjured

12.______today,bewouldgettherebyFriday.

A.Wereheleave

B.Wasbeleaving

C.Werehetoleave

D.Ifheleaves

13.Finallyhegottimeforaglance______thisreport.

A.offB.roundC.onD.at

14.—Hasthewalletbeenreturnedyet?—No，butweexpect______anydaynow.

A.toreturnit

B.ittoreturn

C.ittobereturned

D.itreturned

15.Thebankisreportedinthelocalnewspaper,_______inbroaddaylightyesterday.

A.beingrobbed

B.havingbeenrobbed

C.tohavebeenrobbed

D.robbed

16.Whathedescribedasonlya______detailIthoughtwasthemostimportantpartoftheplan.

A.commonB.plainC.justD.mere

17.Heistooweakto______theheavybox.

A.riseB.putC.raiseD.arise

18.Thesquirrelwasluckythatitjustmissed_______.

A.catchingB.tobecaughtC.beingcaughtD.tocatch

19.Theproblemwassettledtothecompleteofthem,sotheydidn‘tcomplain.

A.amazementB.satisfactionC.disappointmentD.attraction

20.Mr.Black,ournewEnglishteacher,isstrict______kind.

A.orB.butC.withD.aswell

二、翻譯(10題)21.Onlywhenwegivefullplaytoman'sinitiativecanwemakefulluseofmachinestotransfernature.

22.Itisdeterminedthroughteststhattheharmfulsubstancesinafogdroplet,suchasacid,sodium,salt,amine,phenol,dustsandpathogenmicrobes,aredozensoftimesmorethanthatinanormalatmosphericwaterdrop.

23.Canadianagriculturalproductionkeptupwiththecountry'sdemandandstillhadsurplusesforsaletotheindustrialcentersofEurope.

24.我過去常常浪費很多時間玩游戲。_____________________________________________________________________________

25.我代表本公司請您參加今晚七點的晚宴，希望您能光臨。

26.人們有了更多的閑暇時間，因而對各種服務的需求增長得如此快。

A.Peoplenowhavemoreleisuretime,thatiswhythedemandforserviceshasincreasedsorapidly.

B.Peoplenowhavemoreleisuretime,whichisthereasonwhythedemandforserviceshasincreasedsorapidly.

C.Peoplenowhavemoreleisuretime,whichisthereasonwhythedemandforserviceshasbeenincreasedsorapidly.

D.Peoplenowhavemoreleisuretime,whichiswhythedemandforserviceshasbeenincreasedsorapidly.

27.Thepovertylineisthelowestincomethatpeopleneedforanacceptablestandardofliving.Peoplewithincomebelowthepovertylineareconsideredpoor.

28.Suchcrashesarethesecond-leadingcauseofdeathformigratingbirds,afterhabitat(棲息地loss,withanestimatednumberofdeathranginguptoabillionayear.

29.在加工過程中，會重新人為加入某些食物的維生素和礦物質，但卻未必和原來的一樣健康。

A.Duringprocessing,somefood’svitaminsandmineralsmaybeartificiallyaddedbackin,butit’sunlikelytobeashealthyastheoriginal.

B.Duringprocessing,somefood’svitaminsandmineralsmaybeartificiallyaddedbackin,butit’snotaliketobeashealthyastheorigin.

C.Duringtheprocess,somefood’svitaminsandmineralsmaybehandilyaddedbackin,butit’snotlikelytobeashealthyastheoriginal.

D.Duringprocessing,someartificialfood’svitaminsandmineralsmaybeaddedbackin,butit’snotlikelytobeashealthyastheorigin.

30.Quiteafewyoungpeoplenowadayshavethehabitoflisteningtobackgroundmusicwhiledoingtheirhomework.______________________________________________________________________________

三、書面表達(10題)31.以某公司的名義寫一個競賽通知。內容如下：

(1)競賽的名稱和內容。

(2)參與對象。

(3)競賽的時間。

(4)報名的截止日期。

32.根據(jù)提示寫一份舉行隔周一次的英語晚會（every—other．weekEnglishevening）的書面通知。提示：

1．時間：ll月24日，周六晚上7點。

2．地點：2號教學樓的報告廳（1ectureroom）。

3．內容：歌曲、朗誦（recitation）、舞蹈、話劇等，還有美籍教師演講。

4．目的：提高學生英語聽說能力。

5．報名地點：辦公樓203室，學生會（Students’Union）。

注意：

1．要點不得遺漏。

2．符合書面通知的格式。

3．詞數(shù)為100左右。

33.Ⅵ.Writing(25points)Directions:Forthispart,youaresupposedtowriteacompositionin100—120Fordsbasedonthefollowingsituation.Remembertowriteitclearly.61．你以倫敦國際語言中心的名義向大家介紹：1)該中心的教學目的既實用又圍繞商務。教師經(jīng)驗豐富，有現(xiàn)代化的教學方法和設備。想?yún)⒓诱Z言課程請到105室登記。2)除了教學之外，該中心還提供許多其他活動，如電影、英語角、討論和野餐，其目的是提高學生的語言技能。3)英語俱樂部每天上午九點至晚上九點開放，只需申請，會員即可免費使用。

34.假設你是Tom，將去上海旅游，寫一封信給你在上海的朋友張強，告訴他你將乘火車于l0月21日上午8點到達上海，請他接你，并請他幫你安排21至24日的住宿（旅館最好靠近市中心，房間可以小一些，但不要太貴）。此外，你還要他幫你訂24日返回北京的火車票。

注意：詞數(shù)應為100左右

Oct．15

DearZhangQiang，

Allthebest，

Tom

35.Ⅵ.Writing(25points)Directions:Forthispart,youaresupposedtowriteacompositionHealthin100-120wordsbasedonthefollowingtopicsentences.Remembertowriteitclearly.(1)Healthisthefoundationofone'sfuturesuccess.(2)Howcanyouhavegoodhealth?(3)Inaword,nothingismorevaluablethanhealth.

36.你(LiYuan)的生日就要到了，寫封信邀請朋友參加你的生日聚會。信的內容包括：

(1)告知對方聚會的具體時間、地點。

(2)到達聚會地點的行車路線及便利的交通工具。

37.Writing（25points)

你(LiYuan)剛買了一塊表，但你不滿意，因為它總有毛病。寫一封抱怨信，其內容如下：

(1)買表的時間、地點；

(2)出現(xiàn)的問題；

(3)要求退貨。

38.你不慎將手機丟失。請寫--N尋物啟事，內容大致包括以下方面：

(1)你的手機的品牌和外觀(如顏色、形狀等)。

(2)丟失的時間和地點。

(3)手機對你的重要性。

(4)希望拾到的人將手機送還。

(5)表示感謝，并提供你的聯(lián)系方式(LiYuan，Tel：66778899)。

39.你(LiYuan)從報紙上得知某公司在招聘英文秘書，你愿意應聘。給曾經(jīng)在這個公司工作過的一個朋友(Tom)寫封信，詢問有關信息。內容包括：

(1)說明在哪兒獲得招聘信息。

(2)說明為什么愿意應聘。

(3)詢問有關該公司的信息。

40.假如你叫李昕，你在昨天的中國日報上看到一則招聘秘書的廣告。寫一封信應聘，介紹你的情況。字數(shù)：100左右；1.22歲；高中畢業(yè)。2.在職業(yè)學校(businessschool)學習兩年。3.學習酒店管理(hotelkeeping)、打字和公關(publicrelations)。4.擅長電腦和英語聽說。

四、翻譯(20題)41.董事長以公司的名義宣布了這項決定.

42.Althoughheisn'tsuccessfulnow,hedoesn'tconsiderhislifeasafailure.

43.Themeetingwasn’theldbecauseyouwereabsent.

44.Thetoyshavetomeetstrictsafetyrequirementsbeforetheycanbesoldtochildren.

45.他贊成采取嚴格的措施來控制污染。

46.Asyoumightexpect,thestatueisverybig.Visitorscanrideanelevatorfromthegroundtothebottomofthestatue.

47.國慶節(jié)快到了，很多人在忙著準備去旅游。

48.Bothsoundandnoisecanhavenegativeeffects,butwhatismostimportantisifthepersonhascontroloverthesound.

49.Internationalstudentscan'tworkwhiletheyarestudyingintheU.S.,sotheymustshowschoolsthattheyhaveenoughmoneyfortuitionandlivingexpenses.

50.Theyhavemadeanambitiousplansoastobuyalargercompany.

51.我過去常常浪費很多時間玩游戲。_____________________________________________________________________________

52.Resourcesonlandarebeginningtogrowless.Thesea,however,stilloffershopetosupplymanyofman’sneeds.

53.Weshouldblamecomputervirusesfordestroyingsomeofourimportantdocuments.

54.Thisreportsummedupthenewachievementsmadeinoureconomy,cultureandeducation.

55.Acultureanditslanguagesareasinseparableasbrainandbody;whileoneisapartoftheother,neithercanfunctionwithouttheother.

56.Forweekshehadworriedoverhowtoconvincethegraduatesthatthey,too,couldsucceedagainstseeminglyimpossibleodds,thattheycouldmovemountains.

57.解決這個問題有種種方法。

58.Onlywhenwegivefullplaytoman'sinitiativecanwemakefulluseofmachinestotransfernature.

59.為了安全起見，本電器裝置只有正確安裝在干燥陰涼的基座上才能運行。

A.Foryoursafe,theelectricalappliancecanonlybecorrectlymountedonadryandcoolbase.

B.Safely,theelectricalappliancecanonlybecorrectlymountedonadryandcoolbase.

C.Tobesafe,theelectricalapplianceonlycanbecorrectlyinstalledonadryandcoolbase.

D.Forthesakeofsafety,theelectricalappliancecanonlybecorrectlymountedonadryandcoolbase.

60.Thereisanotherconversationwhichfromourpointofviewisequallyimportant,andthatistodonotwithwhatisreadbutwithhowitisread.

五、閱讀理解(5題)61.

PatsyLiwasdiscovered______milesawayfromthesunkenship.

A.40B.400C.4000D.40000

62.Accordingtothepassage，whichofthefollowingwastheearliestkindofexchangeofwealth?

A.Barteredfoods.

B.Fiatmoney.

C.Coincurrency.

D.Intangibleforms.

63.Specificschedulerevisionsforwhichofthefollowingfacilitiesarelistedinthisannouncement?

A.Athleticandrecreational．

B.Foodandtransportation．

C.B00kstoreandpostoffice．

D.Medicalandaudio-visual(視聽的)．

64.

Whydoesthecostoflivingkeepincreasing?

A.Becausearealwaysshortagesofgoods.

B.Becausetheworkersaregettinglowerandlowerpay.

C.Becausethegovernmentmakesnointerference.

D.Becausepeopledemandmoreandbettergoods.

65.Aresomepeoplebornclever,andothersbornstupid?Orisintelligencedevelopedbyourenvironmentandexperience?Strangelyenough,theanswertothesequestionsisyes.Tosomeextent,person'sintelligenceisfixedatbirth,whetherornothereachesthoselimitswilldependonhisenvironment.Thisview,nowheldbymostexperts,canbesupportedinanumberofways.

Itiseasytoshowthatintelligenceistosomeextentsomethingwearebornwith.Thecloserthebloodrelationshipbetweentwopeople,theclosertheyarelikelytobeinintelligence.Thusifwetaketwounrelatedpeopleatrandom(隨意地)fromthepopulation,itislikelythattheirdegreeofintelligencewillbecompletelydifferent.If,ontheotherhand,wetaketwoidenticaltwinstheywillverylikelybeasintelligentaseachother.Relationslikebrothersandsisters,parentsandchildren,usuallyhavesimilarintelligence,andthisclearlysuggeststhatintelligencedependsonbirth.

Imaginenowthatwetaketwoidenticaltwinsandputthemindifferentenvironments.Wemightsendone,forexample,toauniversityandtheothertoafactorywheretheworkisboring.Weshouldsoonfinddifferencesinintelligencedeveloping,andthisindicatesthatenvironmentaswellasbirthplaysapart.Thisconclusionisalsosuggestedbythefactthatpeoplewholiveinclosecontactwitheachother,butwhoarenotrelatedatallarelikelytohavesimilardegreeofintelligence.

Thewriterisinfavoroftheviewthatman'sintelligenceisgiventohim

A.atbirth

B.througheducation

C.bothatbirthandthrougheducation

D.neitheratbirthnorthrougheducation

六、作文(1題)66.假設你的朋友叫楊立，是優(yōu)秀學生。校報請你寫一篇介紹他的短文。他的基本情況是：現(xiàn)在讀高二，是班長，是全班學習最好的;最喜歡學習英語和數(shù)學;愛好體育，課余常踢足球，還是學校游泳隊隊員;經(jīng)常幫助別人。注意：(1)基本情況不可遺漏;(2)要有標題;(3)詞數(shù)為100左右。

參考答案

1.C解析：notonly…butalso連接主語時，謂語動詞根據(jù)就近原則由butalso后的成分來決定。TomandMary是兩個人，所以動詞用復數(shù)形式。

2.B

3.B解析：此處是對將來情況的假設。虛擬條件句的謂語部分為should，had或were時，可把if省去，而把should，had或were放在從句的主語之前，構成主謂部分倒裝。

4.A本題考查祈使句型：

【應試指導】句意：Mary，到這里來，其余的人待在原處。根據(jù)句子的結構可判斷出這是個祈使句。所以要用動詞原形開頭。Mary在句中不是

主語，而是“呼語”。

5.Blaunch為“發(fā)射”講；其余為干擾項。

6.B

7.A本句考查兩個并列句之間的連接的詞。題干的意思是：“氣球能夠浮在空氣中正如船能夠浮在海面上一樣?！痹谒膫€選項中，只有A項的justas有“正如，猶如”的意思。故選A。

8.A解析：shape意為“(女人的)姿態(tài)，身段”；form意為“形狀，形態(tài)”；appearance意為“外表，樣子”；body意為“身體”。由題意知應選A。

9.D

10.B

11.C解析：副詞so置于句首，句子應該用倒裝語序，某人受傷用sb.beinjured來表示，故答案為C。

12.C解析：本題考查倒裝虛擬語氣用法。本句是表示與將來事實相反，所以從句用wereto形式。句意為：如果他今天出發(fā)的話，他就會在星期五以前到達那里。

13.D

14.C

15.C

16.D解析：本題測試形容詞辨析。四個選項的意思分別是“普通的”，“清楚的”，“正義的”，“僅僅的”。根據(jù)句意，D項正確。本句大意為：他僅僅把它作為一個細節(jié)來描述，而我卻認為它是這個計劃中最重要的部分。

17.C解析：本題考查詞義的辨別。rise出現(xiàn)，put放下，raise提起，arise升高。

18.C

19.B

20.B

21.我們只有充分發(fā)揮人的積極性才能充分利用機器來改造自然。我們只有充分發(fā)揮人的積極性才能充分利用機器來改造自然。

22.據(jù)測定，霧滴中各種酸、堿、鹽、胺、酚、塵埃、病原微生物等有害物質的比例，比通常的大氣水滴高出幾十倍。

23.加拿大的農業(yè)生產(chǎn)滿足了該國的需求并有盈余產(chǎn)品銷往歐洲工業(yè)中心。加拿大的農業(yè)生產(chǎn)滿足了該國的需求，并有盈余產(chǎn)品銷往歐洲工業(yè)中心。

24.Iusedtowastealotoftimeplayinggames.

25.OnbehalfofmycompanyI’dliketoinviteyoutothedinnerpartytobeheldatseventonight.Weshouldbegladifyoucouldcome./Iwishyouwouldbepresent.

26.A

27.貧困線是指人們所需要的用以維持可接受的生活水準的最低收入。收入低于貧困線以下的人們被視為窮人。

28.繼棲息地減少之后，這種撞擊是導致遷徙鳥類死亡的第二大原因，據(jù)估計死亡數(shù)量可達十億。

29.D

30.現(xiàn)在，許多年輕人習慣邊聽背景音樂邊做作業(yè)。

31.CompetitionNotice

July18,2009Pleaseinform.anyartstudentsyouknowaboutthisfreetoentercompetition.

FirstPrize:＄5,000

SecondPrize:＄2,000

ThirdPrize:＄1,000

TheStarspaceCompanyrecentlylaunchedastudentartscholarshipcompetitionforuniversitystudents.Thecompetitionisfreetoenterandisopentoartstudentsthroughouttheworld.

Thescholarshipprogramisintendedforstudentswhoexhibitexceptionalartisticexcellenceintheirchosenmedium.Includingphotographyandvideo,bothcontemporaryandtraditionalinnature.

ThedeadlineforsubmissionisNovember21,2009.ScholarshipwinnersareannouncedonDecember19th,2009.StudentsinterestedinsigningupfortheStarspaceScholarshipCompetitioncanfindoutmoredetailsbyvisiting_/scholarships.

TheStarspaceScholarshipCompetition

32.Onepossibleversion:

NOTICE

Inordertoimprovethestudents"listeningandspeakingability，theevery-other-weekEnglisheveningistobeheldinthelectureroom，No.2TeachingBuild-ing，at7:00p.m.thisSaturday，November24th.Pro-gramincludessongs，recitation，dances，playsandsoon.AndourEnglishteacherfromAmericaisgoingtomakeashortspeechaboutEnglishstudy.Everyoneiswelcome.Thosewhowouldliketotakepartinit，pleasesignyournamesattheStudents"Union，Room203，OfficeBuilding.

November20th，2012Students"Union

33.61．本文要點：倫敦國際語言中心LondonInternationalLanguageCenter，設備facilities，登記register，申請applyfor。LadiesandGentlemen,Welcometo

London

International

Language

Center.

WeteachEnglishforbothpracticalandbusinesspurposes.Ourteachersarewellexperienced.TheyusemodernteachingmethodsandfacilitiestohelpstudentsimprovetheirEnglish.YoumaygotoRoom105toregisterforourlanguagecourses.Inadditiontoformalclassroomteaching,weof{erourstudentsalotofotheractivities,includingmovies,EnglishCorners,discussionsandoutings.

AllthoseactivitiesaredesignedtohelpstudentsimprovetheirEnglishlanguageskills.OurEnglishclubopensfrom9a.m.to

9p.m.

everyday.Membersarefreetouseallthefacilitiesoftheclub.Allyouhavetodoistoapplyforacard.

34.Onepossibleversion:

DearZhangQiang，

Howareyoudoingrecently?I"mplanningtogotoShanghaiandlookaroundinthecityforafewdays.I"11takethetrainandarriveat8o"clocka.m.onOctober21st.Willyoupleasecomeandmeetmeatthestation?I"mgoingtostayinShanghaitillOctober24th.Pleasehelpmebookahotelroom.Ihopetostayinahotelaroundthedowntownareabutthepriceshouldn"tbeveryhigh.Idon"tmindiftheroomissmall.Besides，canyoubookaticketformebacktoBeijingon24th?

Allthebest，

Tom

35.61．寫作格式與第三套一樣，不同的是此處段首句以英文給出。本文要點：論述健康對我們的影響，有了好身體我們可以做什么。如何保持健康：1)要進行鍛煉，2)要養(yǎng)成好習慣，3)要自己注意身體變化。HealthHealthisthefoundationofone'sfuturesuccess.Ifyoubecomesick,itisimpossibleforyoutogoonwithyourstudyoryourwork.Onthecontrary,ifyouarestrong,youcanovercomethedifficultiesthatlieaheadofyou.Howcanyouhavegoodhealth?Firstly,youshoulddoexerciseeverydaytostrengthenyoubodies.Secondly,youshouldform.somegoodhabits,suchasearlyrising.Ifyougetupearly,youcanbreathefreshair.Thirdly,youshouldpayattentiontoyourhealth.Ifyouaregettingsick,you'dbetter,gotoseeadoctor.Inaword,nothingismorevaluablethanhealth.Ingoodhealth,astudentmayabsorbmoreknowledgeandsolvemorecomplexproblems.Ingoodhealth,scientistscanachievemoresuccessandmakemorecontributions.

36.DearPam,

Mybirthdayiscoming!Myparentsaregoingtoholdabirthdaypartyformeat13:00onMay29th(Sunday)athome.Willyoubefreeandcometomyparty?I'11beveryhappy.Besides,Tom,Janeandsomeotherclassmatesarecomingtoo.

YoumaytakebusNo.2toQingStreetandwalkstraightabout20meters.Thereyou'llseeadrugstore.Atthecomerofit,turnrightandgetintoaverynarrowstreetandlookforBeigingNo.10.That'smyhome.We'11waitforyouthere.

Pleasecallmebeforethedateifyoucannotcome.

Ican'twaitforthereunion.

Takecare

LiYuan

37.T0whomItMayConcern：

Threedaysago，IjustgotthewatchIorderedfromyourstore．Yousentitontimeandthanksforthat．ButIbmndseveralproblems．First，thecoloritnotwhatlwanted．1wantedgolden，butyougavemesilverinsteac!．IthoughtthatwouldbeOK，ifeverythingelseisgoodenoughThestrangerthinghappens．

Thewatchgetsfiveminutesslowereveryday，SoIhavetokeepcorrectingit．Becauseofthis，Ifeelnervousaboutbeinglateforwork．Ireallycannotstanditanylonger．SoIhavetowritethislettertorequestgivingthewatchbacktoyouandfullmoneybacktome．

Alongwiththeletteristhecopyoftheorder．

Thankyou．Iamlookingforwardtohearingfromyou．

Yourssincorely

LiYuan

38.LOSTAmobilephoneislost.ItisNOKIA3100,black.

IthinkIlostitinthelibraryonMondayevening(May7)whenIwaswalkingaroundtoborrowandreturnbooks.

Itis,infact,averyoldone.Butitisakindofmemoryofoneofmyfriendswhodiedofcancerthreeyearsagowhenshewasonly22yearsold.She'sgonebutleftthemobilephonetome.Ikeepitandneverthinkofreplacingitwithnewonejustbecauseitisfromher.

Ibegyoutocallmeat66778899ifyoufounditsomewhere.Iamexpectingtogetmymobilephoneback.

Thousandthanks.LiYuan

39.DearTom,

Howareyouthesedays?Andhowisyournewjob?

Iambusyonjob-huntingthesedays.IjustreadanadvertisementinthenewspaperthatthecompanyyouworkedbeforeneedsanEnglishsecretary.

Youoncetoldmethatitisagoodcompany.Theworkingenvironmentsuitsyoungpeople.Anditlocatesatdowntown.SoIamthinkingofapplyingforit.

Couldyoutellmesomethingaboutthedevelopmentofthecompanyintheseyearsandthesalarycomparingwithothercompanies?DoIhavetoworklonghours?

Iamlookingforwardtohearingfromyou.

Yours,

LiYuan

40.Deargentleman,Iwishtoapplyforthepositionadvertisedinyesterday’sChinaDaily.IfeelthatIcanmeettheneedsofyourcompany.I’m22yearsofage.Aftergraduatingfromaseniormiddleschool,Itookatwo-yearcourseinabusinessschool,studyinghotelkeeping,typewritingandpublicrelations.I’mgoodatbothoperatingPCandtheEnglishlanguageinlisteningandspeaking.I’minterestedinsecretarialwork.IthinkIhavetheabilitytodotheworkwellandI’mfitforthejob.Iwantverymuchtobeacceptedbyyourcompany.I’llworkhardifIcanworkinyourc