八年级下英语试题

Unit1Trees

Part1Listening

（第一部分听力）（共20分）

I.Listenandchoosetherightpicture（根据你听到的内容，选出相应的图片）：（共

5分）

1._______2._________3._________4._

II.Listentothedialogueandchoosethebestanswertothequestionyouhear

(根据你听到的对话和问题，选出最恰当的答案)：(共5分)

)1.A.Towweeks.B.Onlyaweek.C.Threeweeks.D.Fiveweeks.

()2.A.Onthefifthfloor.B.Onthethirdfloor.

C.Nexttothelibrary.D.Inthelanguagelab.

()3.A.Twodaughters.B.Twosons.

C.Twodaughtersandason.D.Twodaughtersandtwosons.

()4.A.Tea.B.Coffee.C.Water.D.Teaandcoffee.

()5.A.Bybike.B.Bytaxi.C.Onfoot.D.Bybus.

ID.Listentothepassageandtellwhetherthefollowingstatementsaretrueor

false(判断下列句子是否符合你听到的短文内容，符合的用“T”表示，不符合的用“F”

表示〉；(共5分)

()1.Theworld*sbiggestdesert,theSahara,isinAmerica.

()2.Ifpeoplecutdowntrees,thesoilwillbecomeweak.

()3.PeoplecanbuiIdhouses,hospitals,orschoolsinthedesert.

()4.Plantingmoretreesandfarminglesscanmakethesoilstronger.

()5.PeoplecandonothingtostoptheSaharafromgrowing.

IV.Listentothepassageandfillintheblanks(听短文，填写空格)：(共5分)

1.Everyyear,on________12th,peoplegoouttoplanttrees.

2.MissZhangand________otherteacherswentwiththem.

3.Atruck________manyyoungtreestothepark.

4.Theytook________todigholesintheground.

5.Theypushedthe________downhardwiththeirfeet.

Part2VocabularyandGrammar

（第二部分词汇和语法）（共48分）

I.Choosethebestanswer(选择最恰当的答案)：(共20分)

()1.Treesarethebiggestandoldestlivingthingsontheearth.Whichofthe

followingiscorrectfortheunderlinedwordinthesentence?

A./IMU/B./1i:vri/C./II'VI)/D./li:'vi)/

()2.Whichofthefollowingunderlinedpartsisdifferentinpronunciationwith

others?

A.Shehardlydrinkscoffee,becausecoffeeisbadforherstomach.

B.Tommyenjoysplayingcardswithhisfriendsattheweekend.

C.Theescapedprisonerwasbroughtbackunderarmedguard.

D.Icanhearhimsinginginthekitchen.

()3.Thecleanwaterandfreshairinthecountrysidekeepmeandhealthy.

A.aliveB.livedC.livingD.live

()4.Treescanprotectthsmselvesproducingachemical.

A.byB.fromC.withD.in

()5.Thoughweliveindifferentcountries,weofteneachotherbyphone

oremails.

A.communicationwithB.communicatewith

C.contactwithD.communicatein

()6.Theyareplayingchessoverthere.Let'sgoand________them.

A.takepartinB.attendC.joinD.joinin

()7.Wemusttryourbesttofightpollution.

A.forB.againstC.withD.to

()8.Theseafoodhismothercookedtastedsothateveryoneatealot.

A.deliciousB.wellC.terriblyD.badly

()9.Asweallknow,people1ivewithoutoxygen.

A.shouldn*tB.mayC.can'tD.can

()10.Bequiet!Mysisterforherexaminthenextdoor.

A.preparesB.prepared

C.haspreparedD.ispreparing

()11.Thewaterhereisnclmixedwilhanylhin〉elsebecauseitisnotpolluted

byanyindustrialwastes.

A.pollutedB.cleanC.pureD.dirty

()12.—Shallwegooutforawalk?

-Sorry,Ican't.I________myhomework.

A.didB.amdoingC.doD.havedone

()13.Don'tmakesomuchnoise.Th<3studentsaChineseclass.

A.arehavingB.hadC.haveD.werehaving

()14.JohnisfromBritain.He____English.

A.wi11speakB.speakC.speaksD.isspeaking

()15.Studentswillmakegreatprogressifthey________asubject.

A.areinterestinginB.areinteresting

C.areinterestedinD.areinterested

()16.EveryoneexceptJack.Heisgoingoverhislessonsinthesitting

room.

A.aresleepingB.issleepingC.sleepingD.sleep

()17.Al1ofusfortheShanghaiWorldExpothesesdays.

A.prepareB.hasprepared

C.arepreparingD.ispreparing

()18.Somanytreesarethatbirdshavenoplacetolivein.

A.cutupB.cutdownC.takeninD.takendown

()19.Marycan*thelpyounow,becausesheherhomework.

A.doesB.doC.takeninD.isdoing

()20.Myparentsme,soIoftentalkwithmyfriends.

A.arenotunderstandingB.don'tunderstand

C.doesn,tunderstandD.isn'tunderstanding

II.Completethefollowingpassagewiththewordsorphrasesinthebox.Eachcan

onlybeusedonce(将下列单词或词组填入空格。每空格限填一词，每词只能填一次)：

(共8分)

A.carelessB.unfortunatelyC.realizedD.provideE.careful

Treesareimportanttomaninthreedifferentways:TheyIhimwithwood

andotherproducts;theygivehimshadeandhelptopreventdrought(干旱)andflood.

2inmanypartsoftheworld,manhasnot3thatthethirdofthese

seriousfactsisthemostimportant.Inhiseagernesstomakemoneyfromtrees,he

hascutthemdowninlargenumbers.Andbesides,heisusuallytoo4toplant

andlookafteryoungtrees.Sotheforestsslowlydisappear.

A.expertsB.pleasureC.funnyD.chooseE.possible

ReadingforpleasureistheeasiestwaytobecomeabetterreaderinEnglish.

Itisalsothemostimportantway.

Somestudentssaytheydor/twanttoreadfor5.Theysaytheywantto

usetheirtimetolearntherulesofthelanguageandnewwords.Theysaythatpleasure

readingistooeasy.

Many6saypleasurereadingisveryimportantforlearningEnglish.Dr.

StephenKrashcn,afamousexpertonlearninglanguages,saysthatpleasurereading

helpsyoulearnmanyimportantthingsaboutEnglish.Studentslearnmoregrammar

andmorewordswhentheyreadforpleasure.Theyalsolearnmoreaboutgoodwriting.

Dr.Krashentellsusthatpleasurereadinghelpseachstudenttolearnsomething

forhimself.Pleasurereadingmakesit7foreachstudenttolearnwhathe

orsheneeds.

Readingforpleasureisnotthesameasstudying.Whenyoureadforpleasure,

you8yourownbooks,andyoudon,thavetoremembereverything.Thereare

notestsonyourpleasurereadingbooks.Pleasurereadingwillhelpyou:

•learnhowEnglishspeakersuseEnglish

•readfasterinEnglish

•findexamplesofgoodwritinginEnglish

•learnnewwords

•learnabouttheculturesofEnglishspeakers

HI.Completethesentenceswiththegivenwordsintheirproperforms（用括号中

所给单词的适当形式完成下列句子）：（共8分）

1.Mygrandpagetsupearlyeverymorningto______（breath）freshair.

2.Spidersare（nature）enemiesofcertainanimalsintheforest.

3.Theworkersuseda______（chemistry）tokillmiceinthefactory.

4.Wemusttakeactiontostopthatfactoryfrom（pollution）theriveras

soonaspossible.

5.MybrotherdrovesoquicklythatIfeltmylifewasin（dangerous）.

6.Withthedevelopmentoftechnology,moreandmorecarshavebeen（product）

inthisfactory.

7.David,sambitionistobecomeagreat______（science）inthefuture.

8.ThoughIJmonlyastudent,141trymybestto______（fighter）againstpollution.

IV.Rewritethefollowingsentencesasrequired（根据所给要求，改写下列句子。每

空格限填一词）：（共12分）

1.TheGradeEightstudentsareplantingtreesoverthere.（改为一般疑问句）

theGradeEightStudentstreesoverthere?

2.Ihavealreadyeatensomething.（改为否定句）

Ihaven'teaten.

3.Peoplecantakephotosthere.（对划线部分提问）

canpeoplethere?

4.Lindaalwaysgetsupearlyinordernottobelateforschool.（对划线部分提

问）

Lindaalwaysgetupearly?

5.WemustthankJohn.HehelpedoursonwithhisEnglish.（保持句意不变）

WemustthankJohnoursonwithhisEnglish.

6.cool,trees,clean,and,air,can,both（连词成句）

Part3ReadingandWriting

（第三部分阅读和写作）（共32分）

I.Readingcomprehension（阅读理解）

A.Choosethebestanswer（根据短文内容，选择最恰当的答案）：（共6分）

Alongtimeago,therewasahugeappletree.Alittleboylovedtocomeandlay

arounditeveryday.Heclimbedupthetree,atetheapples,tookanapintheshadow.

Helovedthetreeandthetreelovedtoplaywithhim.Astimewentby,thelittle

boyhadgrownupandhenolongerplayedaroundthetreeeveryday.Oneday,theboy

camebacktothetreeandhelookedsad."Comeandplaywithme,wthetreeasked

theboy.wIamnolongerakid,Idon'tplayaroundtreesanymore.wTheboyreplied,

“Iwanttoys.Ineedmoneytobuythem.wMSorry,butIdon'thavemoney,but

youcanpickallmyapplesandsellthem.So,youwi11havemoney.nTheboywas

veryexcited.Hegrabbedalltheapplesonthetreeandlefthappily.Theboynever

camebackafterhepickedtheapples.Thetreewassad.

Oneday,theboyreturnedandthetreewassoexcited."Comeandplaywithme,“

thetreesaid."Idon,thavetimetoplay.Ihavetoworkformyfamily.Weneed

ahouseforshelter.Canyouhelpme?”MSorry,butIdon'thaveahouse.Butyou

canchopoffmybranchestobuildyourhouse."Sotheboycutallthebranchesoff

thetreeandlefthappily.Thetreewasgladtoseehimhappybuttheboynevercame

backsincethen.Thetreewasagainlonelyandsad.

Onehotsummerday,theboyreturnedandthetreewasdelighted.MComeandplay

withme!”thetreesaid.aIamsadandgettingold.Iwanttogosailingtorelax

myself.Canyougivemeaboat?w"Usemytrunktobuildyourboat.Youcansail

farawayandbehappy.wSotheboycutthetreetrunktomakeaboat.Hewentsailing

andnevershowedupforalongtime.Finally,theboyreturnedafterheleftfor

somanyyears."Sorry,myboy.butIdon'thaveanythingforyouanymore.Nomore

applesforyou…"thetreesaid."Idon'thaveteethtobite”theboyreplied.

“Nomoretrunkforyoutoclimbon…”"Iamtoooldforthatnow.ntheboysaid.

“Ireallycan,tgiveyouanything'--theonlythingleftismydyingroot."the

treesaidwithtears."Idon'tneedmuchnow,justaplacetorest.Iamtiredafter

alltheseyears.wTheboyreplied."Good!Oldtreerootisthebestplacetolean

onandtest.Come,cometositdownwithmeandrest."Theboysatdownandthe

treewasgladandsmiledwithtears…

)1.Wheredidthelittleboytakeanap?

A.OnthetreetopB.Athome

B.IntheshadowD.Onthebranch

()2.Whathappenedastheboygrewup?

A.Hecametothetreeeveryday.

B.Henolongerplayedaroundthetreeeveryday.

C.Heoftenplayedaroundthetree.

D.Hecametothetreeonceaweek.

()3.Whatdidthetreegivetotheboywhenhesaidheneededmoneytobuytoys?

A.BranchesB.ThetreetrunkC.ApplesD.Leaves

()4.Whydidthetreegiveitsbranchestotheboy?

A.Becauseheneedednoney.B.Becausehewantedaboat.

C.Becauseheneededahouse.D.Becausehewantedfurniture.

()5.Whydidtheboycometothetreewhenhewasold?

A.Togetmoreapples.B.Togetmorebranches.

C.Togetmoretreetrunk.1).Tohavearest.

()6.Whatistherelationshipbetweentheboyandthetreelike?

A.Teachersandstudents.B.Parentsandchildren.

C.Shopassistantsandcustomers.D.Doctorsandpatients.

B.Choosethewordsorexpressionsandcompletethepassage(选择最恰当的单词或

词语完成短文)：(共6分)

Cantreestalk?Yes,butnotinwords.Scientistshavereasontobelievethat

treesdo]eachother.Notlongago,researchers1earnedsomesurprising

findings.Firstawillowtree(柳树)attackedinthewoodsbycaterpillars(毛

毛虫)changedthe2ofitsleavesandmadethemtasteso3that

thecaterpillarsgottiredoftheleavesandstoppedeatingthem.Thenevenmore

astonishing,thetreesentaspecialvapour-asignalcausingitsneighbors_4

thechemistryoftheirownleavesandmakethemlesstasty.

Communication,ofcourse,doesn*tneedtobein5.Wecantalktoeach

otherbysmiling,raisingourshouldersandmovingourhands.Weknowthatbirds

andanimals6awholevocabularyofsongs,sounds,andmovements.Beesdance

theirsignalsbyflyingincertainpatternsthattel1waysofsendingmessages.

（）1.A.talktoB.communicatewith

C.saytoD.communicatingwith

（）2.A.colorB.shapeC.chemistryD.appearance

（）3.A.goodB.deliciousC.terriblyD.terrible

（）4.A.tochangeB.changingC.changeD.tobechanged

（）5.A.soundB.voiceC.wordsD.action

（）6.A.makeB.hasC.useD.are

c.Readthepassageandfillintheblankswithproperwords（在短文的空格内填入

适当的词，使其内容通顺，每空格限填一词，首字母已给）：（共6分）

Someoftheworld*sbiggest11treesarethegiantsequoias（红杉）in

northernCaliforniaintheUSA.Theyarecloser2ofpines.Manygiantsequoias

measuremorethan60metersfromtheirrootstotheirtallestb3Thebiggest

oneisanenormoustreewhichis83metrestallandhasatrunkmorethan31metres

round.Somegiantsequoiasareabout3000yearsold.Thetreesarec4with

redbark（树皮）whichisupto60centimetresthick.Thisp5themfromfires,

allowingthemtolivelonger.Sincethesetreesaresohuge,somehavehadholes

madeintheirbases.Theseholesarew6enoughforcarstodrivethrough.

D.Answerthequestions（根据短文内容回答下列问题）：（共6分）

Doyouknowsomethingabouttreerings（年轮）?Doyoukrowtheycantellus

whattheweatherwaslike,sometimeevenhundredsofyearsago?

Atreewillgrowwellinaclimatewithlotsofsunshineandrainfall.Andlittle

sunshineorrainfallwilllimitthegrowthofclimatebystudyingthetreerings.

Forexample,tofindouttheveatheroftenyearsago,counttheringsofatree

fromtheoutsidetotheinside.Ifthetenthringisfarfrorctheeleventhring,

thenwc'rcsurethatitwassunnyandrainymostofthatyeer.Ifitisnearto

theeleventhring,thentheclimatethatyearwasbad.

Treeringsareimportantnotonlyforstudyingthehistoryofweatherbutalso

forstudyingthehistoryofman.Manycenturiesagotherelivedalotofpeopleat

aplaceinNewMexico.Butnowyoucanfindonlysandthere—notreesandnopeople.

Whathappened?

Ascientiststudiedtheringsofdeadtreesthere.Hefoundthatthepeoplehad

toleavebecausetheyhadcutdownallthetreestomakefiresandbuildings.As

allthetreeshadgone,thepeopletherehadtomove.

1.Whatcantelluswhattheweatherwaslikemanyyearsago?

2.Howcanatreegrowwell?

3.Howcanpeoplefindoutth?weatheroftenyears-ago?

4.Ifthetenthringisfarfromtheeleventhring,whatwastheweatherlikethat

year?

5.Aretreeringsonlyusefulforstudyingthehistoryofweather?

6.WhydidpeoplehavetoleavetheplaceinNewMexico?

II.Writing（写话）：（共8分）

Writeatleast60wordsaboutthetopic“TreesareOurFriendsM（以“树是

我们的朋友”为题写一篇不少于60个词的短文，标点符号不占格）

Suggestedquestions:

1）Whatcantreesdoforus?

2）Whatshouldwedofortrees?

Unit2Water

Part1Listening

（第一部分听力）（共20分）

I.Listenandchoosetherightpicture（根据你听到的内容，选出相应的图片）：（共

5分）

1._______2._______3._______4._______5._

II.Listentothedialogueandchoosethebestanswertothequestionyouhear

（根据你听到的对话和问题，选出最恰当的答案）：（共5分）

()1.A.BybikeB.BybusC.onfootD.bytaxi

()2.A.6yuanB.12yuanC.18yuanD.24yuan

()3.A.InaschoolB.Atahotel

C.InasupermarketD.Atarestaurant

()4.A.Tom'sdadB.Tom'smum

C.TomD.Tom'sbrother

()5.A.MondayB.TuesdayC.WednesdayD.Thursday

HI.Listentothepassageandtellwhetherthefollowingstatementsarctrueor

false(判断下列句子是否符合你听到的短文内容，符合的用“T”表示，不符合的用“F”

表示)：(共5分)

()1.Benwasgoodatdiving.

()2.Benwenttotherivereveryday.

()3.Sometimeshewasabletocatchsomefishandsometimeshewasn,t.

()4.WhenBencouldn,tcatchanyfish,hefeltangry.

()5.Benlivedneartheseawithhisparents.

IV.Listentothepassageandfillintheblanks(听短文，填写空格)：(共5分)

1.Weshouldhelpeveryoneasmuchaswecanbecauseweoftenneedhelp_________.

2.Anantwasdrinkingatasnailriverand_________in.

3.Withthewood,theantreachedthe_________again.

4.Themanwaswalkingwithoutshoesonhisfeetand________aguninhishand.

5.Theantbithiminoneofhisfeetandthebird_________away.

Part2VocabularyandGrammar

（第二部分词汇和语法）（共48分）

I.Choosethebestanswer(选择最恰当的答案)：(共20分)

()1.Weshouldn,twastetime,becauseitisveryprecious.Whichofthefollowing

iscorrectfortheunderlinedwordinthesentence?

A./tre^s/B./bra:Jfe]C./brajbs/D./brc»^:s/

()2.Whichofthefollowingunderlinedpartsisdifferentinpronunciationwith

others?

A.Wouldyoupreferriceornoodles?

B.Manypeoplewereforcedtoleavetheirhomesbecause3ftheflood.

C.Thehungryfinishedthefoodontheirplateimmediately.

D.MymemoriesofchildhoDdareepisodic.

()3.Tomisveryshy.Whentheteacheraskshimquestions,healwayskeepssilent.

A.maintainsB.renainsC.containsD.protects

()4.Thispipecantakethedirtywatertothewatertreatment

A.worksB.workC.jobD.jobs

()5.Thefoodinthefridgeisnotfresh.Itis______.

A.freezeB.frozenC.freezingD.freezes

()6.Sometimeswechangeiceintoa__.Wecallitwater.

A.solidB.vapourC.gasD.liquid

()7.“Idon'tknow."Herepliedina_____voice.

A.loudB.faintC.loudlyD.faintly

()8.Waterispouringintothesinkanddisappearingcownthedrain.The

underlinedpartmeans"______”.

A.freezingB.vanishingC.floatingD.flowing

()9.Recyclingofrubbishcostsmoneyandrequiresspecial_

A.equipmentsB.appliancesC.equipmentD.tool

()10.Adoveisoftenusedasaofpeace.

A.markB.signC.symbolD.signal

()11.Everybody,youngorold,theOrientalPearlTVTower.

A.enjoytovisitB.enjoystovisit

C.enjoyvisitingD.enjoysvisiting

()12.Scientistshavecollectedabouttheocean.

A.manyinformationB.alotofinformation

C.quiteafewinformationsC.alotinformation

)13.Theletterfrommyauntwasshort.Therewasn'tnews.

A.fewB.manyC.muchD.few

)14.Thereareonlynewwordsinthearticle,butIknowof

them.

A.some;allB.lotsof;afewC.afew;noneD.few;none

()15.—Youlookverytirsdtoday.Whatdidyoudoyesterday?

—Don"tworry.Thereis_____timetogo.

A.alotofB.afewC.anumberD.many

()16.一Wehavetohurry.Thetrainleavesat10:35.

-Don*tworry.Thereistimetogo.

A.someB.littleC.few【).afew

()17.mnotfeelingwell,maybeit'sbecauseIhaveeaten_______.

A.toofewB.toolittleC.toomuchD.toomany

()18.ThoughIcouldspeakonlyFrench,Imanagedtocommunicatewith

localpeople.

A.fewB.littleC.afewD.alittle

()19.ShehaslivedinShanghaiformanyyears,butshehasmade_______friends.

A.manyB.muchC.littleD.few

()20.Sincetherearenot_______applesforallofus,V11gotothesupermarket

tobuy________.

A.few;someB.emugh;someC.enough;anyD.many;any

II.Completethefollowingpassagewiththewordsorphrasesinthebox.Eachcan

onlybeusedonce(将下列单词或词组填入空格。每空格限填一词，每词只能填一次)：

(共8分)

A.undrinkableB.surviveC.resourcesI),breatheE.oxygen

Peoplecan'timaginelifewithoutwater.Withoutit,theearthweliveonwould

beadeadone.Therewouldberotrees,nocrops,noanimalsandnopeople.Sowater

isconsideredtobenextto]inimportance.

Althoughnearlythreequartersoftheearthzssurfaceiscoveredwithwater,

itisseawaterand2.Thedemandforwaterisincreasing,whilewater

3arescarce.Agriculturalproductionneedsenormousamountsofwater,sodoes

industry.Besides,therapidgrowthofpopulationmakesitmoreandmoredifficult

forpeopleto4becauseofthewatershortage.Sowatershortagehasbecome

oneofthemostseriousproblems.

A.pollutedB.popularC.forestsD.populationE.fall

Thirtyyearsago,LakePonkapoginHartwell,NewJersey,wasfulloflife.Many

birdsandanimals1ivedbesidethewater,whichwasful1offish.Nowtherearefew

birds,animals,andfish.Thelakewateris5.Itisinacolourofdirty

brown,anditisfilledwithstrangeplants.

Howdidthishappen?First,wemustthinkabouthowwatergetsintoLakePonkapog.

Whenitrains,watercomesintothelakefromallaround.Inthepast,therewere

6allroundLakePonkapog,sotherainwaterwasclean.

Nowtherearemanyhomesaroundthelake.Peopleoftenusechemicals(化学制

品)intheirgardens.Theyuseotherchemicalsinsidetheirhousesforcleaning

andkillinginsects.Therearealsomanybusinesses.Businessesusechemicalsin

theirmachinesofshops.Otherchemicals7ontothegroundfromcarsortrucks.

Whenitrains,therainwaterpicksupallthechemicalsfromhomeandbusinesses

andthencarriesthemintothelake.Theypollutethewaterandkilltheanimals.

Boatsonthelakearealsoaproblem.LakePonkapogisa8placefor

motorboats(汽船).Butoilandgas(汽油)fromboatsoftengetintothelake.So

morebadchemicalsgointothewaterthisway.

ID.Completethesentenceswiththegivenwordsintheirproperforms（用括号中

所给单词的适当形式完成下列句子）：（共8分）

1.Don*therlikethat.Sheisonlyachild,（treatment）

2.Withsomuchworktodo,Iseldomhavetimeto.（relaxation）

3.Ifyouhavetostandinthequeuefortwohours,you'11become______（patient）.

4.East,West,homeisbest.Ialwaysfeelmostathome,（comfortably）

5.Whatdoyouthinkismore（value）,moneyorhealth?

6.Hecouldn,tsolvethismathsproblem.Helookedvery（puzzle）.

7.Peoplearenotwillingtogooutinsuchweather,（freeze）

8.hasbecomeamoreandmoreimportantissueinmanycountries,（pollute）

IV.Rewritethefollowingsentencesasrequired（根据所给要求，改写下列句子。

每空格限填一词）：（共12分）

1.Fewstudentswenttothecinemayesterday.（改为反意疑问句）

Fewstudentswenttothecinenayesterday,?

2.Alloftheboysinmyclasslikeplayingbasketball.（改为否定句）

oftheboysinmyclassplayingbasketball.

3.Hishomeis5kilometersawayfromhisschool.（对划线部分提问）

ishishomeawayfromhisschool?

4.Hewenttoliveinthecountrysidetofindsomepeaceandquiet.（对划线部分

提问）

_hegotolivetofindsomepeaceandquiet.

5.Theclassroomissodirtythatwecan'tstudyinit.（保持句意不变）

Theclassroomisn,tforustostudyin.

6.you,travelling,the,why,holiday,go,don,twinter,during（连词成句）

Part3ReadingandWriting

（第三部分阅读和写作）（共32分）

I.Readingcomprehension（阅读理解）

A.Choose（根据短文内容，选择最恰当的答案）：（共6分）

Whentheweatherishot,yougotoalakeoranocean.Whenyouarenearalake

oronocean,youfeelcool.Why?Thesunmakestheearthhot,butitcannotmake

thewaterveryhot.Althoughtheairovertheearthbecomeshot,theairoverthe

waterisstillcool.Thehotairovertheearthgoesup.Thenthecoolairoverthe

watermovesinandtakestheplaceofthehotair.

Thenyoumayask,“Whyistheoceanfullofsalt?”Scientistswillsaythat

thesaltcomesfromtherocks.W