中考阅读理解训练题

中考阅读理解训练题

Passage1

Weknowthatmanyanimalsdonotstayinoneplace.Birds,fishand

otheranimalsmovefromoneplacetoanotheratacertaintime.They

movefordifferentreasons:mostofthemmovetofindfoodmoreeasily,

butothersmovetogetawayfromplacesthataretoocrowded.

Whencoldweathercomes,manybirdsmovetowarmerplacestofind

food.Somefishesgivebirthinwarmwaterandmovetocoldwaterto

feed.Themostfamousmigration（迁移）isprobablythemigrationoffish,

whichiscalled“salmon”.Thisfishisborninfreshwaterbutittravels

manymilestosaltwater.Thereitspendsitslife.Whenitisold,itreturns

toitsbirthplaceinfreshwater.Thenitgivesbirthanddies.Innorthern

Europe,thereisakindofmouse.Theyleavetheirmountainhomeswhen

theybecometoocrowded.Theymovedowntothelowland.Sometimes

theymoveallthewaytotheseaside,andmanyofthemarekilledwhen

theyfallintothesea.

Recently（近来），scientistshavestudiedthemigrationofakindof

lobster（龙虾）.Everyyear,whentheseasonofthebadweatherarrives,

thelobstersgetintoalonglineandstarttowalkacrossthefloorofthe

ocean.Nobodyknowswhytheydothis,andnobodyknowswherethey

go.So,sometimesweknowwhyhumansandanimalsmovefromone

placetoanother,butatothertimeswedon't.Maybelivingthingsjustlike

totravel.

l.Mostanimalsmovefromoneplacetoanotheratacertaintimeto

A.givebirthB.enjoywarmerweather

C.findfoodmoreeasilyD.findbeautifulplaces

2.Thefishcalled“salmon”spendsalongtimein.

A.saltwaterB.riversC.freshwaterD.itsbirthplace

3.ThemiceinnorthernEuropemovewhen.

A.theygivebirthB.theplacegetstoocrowded

C.theweatherisbadD.theyhaven'tenoughfood

4.Thelobstersmove.

A.tothefreshwaterB.atacertaintimeC.totheunderseaD.tofind

morefood

5.Whatisthemainideaofthepassage?

A.Animalsmovetofindfoodmoreeasily.

B.Themigrationofthefishcalled“salmon”isthemostfamous

migration.

C.Livingthingsmovefromoneplacetoanotherbecausetheyliketo

travel.

D.Sometimesweknowwhyandhowlivingthingsmovefromoneplace

toanother,butsometimeswedon't.

Passage2

Ifyoulookattheskyonenightandseesomethingmovingandshining

thatyouhaveneverseenbefore,itmightbeacomet（彗星）.

Acometsometimeslookslikeastar.Likeaplanet,acomethasnolight

ofitsown.Itshinesfromthesunlightitreflects（反射）.Liketheearth,a

cometgoesroundthesun,butonamuchlongerpath（轨道）thanthe

earthtravels.

Ifacometisn'tastar,whatisitthen?

Somescientiststhinkthatalargepartofacometiswaterfrozeninto

piecesoficeandmixedwithironandrockdustandperhapsafewbig

piecesofrock.Whensunshinemelts（融化）theiceinthecomet,great

cloudsofgasgotrailingafterit.Theseclouds,togetherwiththedust,

formalongtail.

Manypeopleperhapshaveseenacomet.Howevernooneknowshow

manycometsthereare.Theremaybemillionsofcomets,butonlyafew

comecloseenoughforustosee.

AnEnglishmannamedEdmundHalley,wholivedfrom1656to1742,

foundoutalotaboutthepathsthatcometstakethroughthesky.Some

cometsmoveoutofoursightandnevercomeback.Otherskeepcoming

backatregulartimes.Abigcometthatkeepscomingbackwasnamed

afterHalleybecausehewastheonewhoworkedoutwhenitwouldcome

backagain.MaybeyouhaveeverseenHalley'sCometsbecausethelast

timeitcameclosetothesunandtheearthwasintheyear1986.Then

peopleallovertheworldwereoutsideatnighttolookatit.Youwill

probablybeabletoseeHalley'sCometswhenitcomesneartheearth

again.

l.Acometislike.

A.sunB.moonC.sunlightD.theearth

2.Alargepartofacometis.

A.waterandrockB.waterfrozenintopiecesoficeandmixedwithiron

C.ice,ironandrockdustD.onlyafewbigpiecesofrock

3.Maybemanypeople.

A.haven'tseenanycometsB.haveseenallcomets

C.haveseenacometatdaytimeD.haveseenacomet

4.Somecometskeepcomingback.

A.atanytimeB.atnoonC.atregulartimesD.atdaytime

5.Halley'sCometscameback.

A.in1990B.in1980C.in1986D.in1989

Passage3

Doyouknowsomethingabouttreerings（年轮）？Doyouknowthey

cantelluswhattheweatherwaslike,sometimesevenhundredsofyears

ago?

Atreewillgrowwellinaclimate（气候）withlotsofsunshineand

rainfall.Andlittlesunshineorrainfallwilllimit（限制）thegrowthof

climatebystudyingthetreerings.Forexample,tofindouttheweatherof

tenyearsago,counttheringsofatreefromtheoutsidetotheinside.If

thetenthringisfarfromtheeleventhring,thenwe'resurethatitwas

sunnyandrainymostofthatyear.Ifitisneartotheeleventhring,then

theclimatethatyearwasbad.

Treeringsareimportantnotonlyforstudyingthehistoryofweather

butalsoforstudyingthehistoryofman.Manycenturiesagothereliveda

lotofpeopleataplaceinNewMexico.Butnowyoucanfindonlysand

there—notreesandnopeople.Whathappened?

Ascientiststudiedtheringsofdeadtreesthere.Hefoundthatthe

peoplehadtoleavebecausetheyhadcutdownallthetreestomakefires

andbuildings.Asallthetreeshadgone,thepeopletherehadtomove.

1.ingoodclimate.

A.Treeringsgrowfarfromeachother

B.Treeringsbecomethinner

C.Treesdon'tneedsunshineorrainfall

D.Peoplecancutdownmostofthetrees

2.Thescientistsareinterestedinstudyingtreeringsbecausetreeringscan

tell.

A.whetheratreewasstrongornot

B.whetherpeopletookgoodcareofthetreesornot

C.whethertheclimatewasgoodornot

D.howoldthetreeswere

3.Ifyouwanttofindouttheweatheroftwentyyearsago,youshould

study.

A.thetwentiethringB.thetenthring

C.thenineteenthringD.thetwenty-firstring

4.Whydidpeopleusuallyliveinplaceswithlotsoftrees?

A.Treescouldtellthechangeoftheweather

B.Treesbroughtlotsofsunshineandrain

C.Treescouldmakeweathernottoohotortoocold

D.Treescouldbeusedforburningandforbuildinghouse

5.ThepeoplehadtoleavetheplaceinNewMexicobecause.

A.hadweatherstoppedthegrowthoftrees

B.theynolongerhadwaterandthelandbecamesand

C.theydidn'thaveenoughtreesforburning

D.therewastoomuchrainthere

Passage4

Allourfoodcomesfromthesoil（土壤）.Someofuseatmeat,but

animalsliveonplants.Ifthesewerenoplants,weshouldhavenoanimals

andmeat.Sothesoilisnecessaryforlife.

Thetopofgroundisusuallycoveredwithgrassorotherplants.Plants

growinsoil,whichhasadarkcolor.Thisdarksoilishumus,deadleaves,

deadplantsandanimalwastemakeit,butthistakesalongtime.When

thehumushasbeenmade,plantscangrowwellinit.

Allsoilneedsfood.Ifwedon'tgiveitany,theplantswillbeweak.

Animalswasteisthebestfoodforthesoil,butchemicalfertilizers（化月巴）

arealsoveryuseful.Thesamecropshouldnotbegrowninthesame

placeeveryyear;itisbettertohaveadifferentcrop.Achangeofcropand

theuseofagoodfertilizerwillkeepthelandingoodcondition.

Whenthesoilisdry,thewindblowsitaway.Sometimesheavyrain

carriesthehumusdowntoariver.Peopleshouldgrowmoreandmore

treesandgrasstostopwindfromcarryingthehumusaway.Ittakes

hundredsofyearstomakehumus,andsowemustsaveeverybitofit.

Withoutsoil,wherecanwegrowfood?

1.Fromthetext,weknowpeopleliveon.

A.animalB.plantC.meatD.soil

2.Theword“humus“meansinChinese.

A.微生物B.土壤C.腐殖土D.粘土

3.Weshouldtokeepthesoil.

A.givemorefertilizersB.killmoreanimals

C.makemorehumusD.growmoretreesandgrass

4.Weshouldsaveeverybitofhumus,because.

A.ittakesalongtimetomakehumus

B.themorehumusinthesoil,thebetterplantsgrow

C.thechemicalfertilizersareexpensive

D.AandB

5.Thebesttitleofthistextshouldbe.

A.Soilisnecessarytopeople

B.Thesamecropcan'tbegrowninthesameplaceeveryyear

C.Soil'sfoodischemicalfertilizers

D.Humusishardtomake

Passage5

Intheseatherearemanyislands.Initswarmwaterstherearesome

littleones.Wecallthem“coralIslands".

Acoralislandisverynicetolookat.Itlookslikearingofland（一圈

陆地）withtrees,grass,andflowersonit.Onepartoftheringisopento

thewater.Thereisalittleroundlakeinsidetheisland.

Ifyoulookintothislake,youwillseebeautifulcoral.Yousaythink

theyareflowers.Ifyoulookatapieceofcoral,youwillseemanylittle

holesinit.Ineachoftheseholesaverysmallseaanimalhaslived.These

seaanimalsmakethecoral.

Theybegantobuildunderthewater.Yearafteryear,thecoralgrew

higherandhigher.Atlastitgrewoutofthewater.

Thentheseabroughtitsmalltreesandsomethingelse.Aftersome

years,thesethingschangedintoearth.Sometimesthewindbroughtseeds

（种子）tothisearth.Sometimesbirdsflewoveritandbroughtseedstothe

island.

Thelittleseedsgrew.Inafewyearstherewereplantsalloverthe

island.Inafewmoreyearsthereweretreesgrowingthere.

Soyousee,theseislandswerebuiltlittlebylittle.Theworkerswere

verysmall.Dotheynotteachusalesson?Canyouthinkwhatthelesson

is?

l.Inthesea.

A.therearecoralislandsinallplacesB.therearesomecoralislands

C.thewaterisalwayswarmD.wecanseemanyflowers

2.Acoralislandlookslike.

A.aroundcakeB.trees,grassandflowers

C.aringoflandD.aroundlake

3.Thereareintheholesincorals.

A.flowersB.littlecoralsC.grassD.seaanimals

4.Howdidseedsoftrees,grassandflowerscometothecoralislands?

A.Thewindandbirdsbroughtthemtothecoralislands

B.Onlythewindbroughtthemthere

C.Peoplebroughtthemthere

D.Fishesbroughtthemthere

5.Fromthestorywelearnthat.

A.smallworkerscan'tdobigthings

B.onlybigworkerscandobigthings

C.smallworkerscandobigthingsiftheyworkhardworkandworka

longtime

D.allsmallthingscandobigthings

Passage6

Whensomeplatesoftheearthmovesuddenly,anearthquakehappens.

Manyearthquakesbeginunderthesea.Earthquakesmayhappen

anywhereontheearth.Theyoftenhappennearthemountains.

Duringanearthquake,theshakingsmakerocksrisesuddenlyandeven

crack（断裂）open.Housesfall,peoplearekilledorhurt,andsometimes

thewholevillagesorcitiesaredestroyed.

Canwedosomethingtokeepourselvessafefromearthquakes?

Scientistshavestudiedearthquakesandmakemapsthatshowthe

uearthquakebeltsn.Inareas（地区）inthesebelts,it，spossiblefor

earthquakestohappen.Intheseareasweshouldbuildstronghousesto

fightagainstearthquakes.

Inthefuture,scientistswillbeabletotellwhenandwherean

earthquakewillbebeforetheyhappen.Theycanalsotellpeoplewhatto

doandhowtodoit.

l.Alargenumberofearthquakesoftenhappens.

A.intheareaB.onlandC.atnightD.nexttomountains

2.Thereasonforanearthquakeis.

A.theresultofrockplatesuddenmovement

B.thattherearesomanyplatesontheearth

C.thattheseaistoodeep

D.rocks'crackingopen

3.Amapshowingtheearthquakebeltswilltellpeople.

A.whatkindofhousestobuild

B.whatkindofhousescanstayupinanearthquake

C.whereearthquakemayhappen

D.howtokeepthemselvessafeduringanearthquake

4.1nthefuturewe'llbenolongersoafraidofearthquakes

A.withthehelpofscientists7exactprediction（预报）

B.becauseofamapshowingthe''earthquakebelts^^

C.becausewecanguessthedateandplaceofearthquakes

D.asscientistsknowwhattodoandhowtodoit

5.Choosethebesttitlefrothepassage.

A.AnEarthquake

B.AScientistandanEarthquake

C.HowtoFightAgainstEarthquake

D.EarthquakesTodayandTomorrow

Passage7

Itseemstousthattheearthstandsquitestill（静止的）.Butitisreally

movingallthetime.Itturnsaroundamake-believelinethroughitscenter.

Wecallthismake-believelinetheearth'saxis（地轴）.Thetwoendsof

theearth'saxisarecalleditspoles（极）.Theearthtravelstwenty-four

hoursarounditsaxisonce.

Welookatthesunandsayit“travels“acrossthesky,butthesun

doesn'treallydoso.Theturningoftheearthmakesusfeelasifthesun

weremovingacrossthesky.Wecan'tseethattheearthismoving

becauseeverythingelseontheearthisturningwithus.Astheearthturns

aroundeverytwenty-fourhours,firstonehalffacesthesunandthenthe

otherhalf.Whenourhalfoftheearthisfacingthesun,wesayitis“day”.

Whenourhalfisawayfromthesun,wesayitis“night”.Itistheturning

oftheearththattellsuswhentogotobedandwhentogetup.

l.Themeaningof“amake-believeline"is“alinethat

A.iscalledpoleB.wecan'tsee

C.anyonecanseeD.wecanmakeandbelieve

2.1ttakestheearthtoturnarounditsaxisonce.

A.aweekB.amonthC.12hoursD.24hours

3.Usuallywesay,“Thesunrisesintheeastandsetsinthewest."Infact,

thesun.

A.doesnotmoveB.ismovingallthetime

C.movessometimesD.istooheavytomove

4.Wecan'tseetheearthmovingbecause.

A.theearthstandsstill

B.everythingontheearthismovingwithus

C.theearthissmallerthanthesun

D.theearthgoesonlyatnight

5.Whenourpartoftheearthturnsawayfromthesunwehave“”,

andwhenourpartfacesthesunwehave

A.day;nightB.day;dayC.night;dayD.night;night

Passage8

Weknowthemosquitoverywell.Mosquitoesflyeverywhere.They

canbefoundalmostallovertheworld,andtherearemorethan2,500

kindsofthem.

Noonelikesthemosquito.Butthemosquitomaydecidethatsheloves

you.She?Yes,she.It'struethatmalemosquitodoesn'tbite（咬）andonly

thefemalemosquitobitesbecausesheneedsbloodtolayeggs.Sheis

alwayslookingforthingsorpeopleshewantstobite.Ifshelikeswhat

shefinds,shebites.Butifshedoesn;tlikeyourblood,shewillturnto

someoneelseformoredeliciousblood.Nexttimeamosquitobitesyou,

justrememberyouarechosen.You'redifferentfromtheothers!

Ifthemosquitolikesyou,shelandsonyourbodywithoutlettingyou

know.Shebitesyousoquicklyandquietlythatyoumaynotfeelanything

different.Aftershebites,youwillhaveanitch（痒）onyourbodybecause

sheputssomethingfromhermouthtogetherwithyourblood.Bythetime

theitchingbegins,andshehasflownaway.

Andthenwhathappens?Well,afterherdeliciousdinner,themosquito

feelstired.Shejustwantstofindaplacetohaveagoodrest.There,ona

leaforawall,shebeginstolayeggs,hundredsofeggs.

1.“Mosquito”meansinChinese.

A.苍蝇B.蜻蜓C.跳蚤D.蚊子

2.Weknowmosquitoesverywellbecause.

A.theycanbefoundeasilyB.theyflyhereandthere

C.therearemanykindsofthemD.theycanfly

3.Ifthemosquitodoesn'tbiteyou,itwill.

A.getangrywithyouB.beafraidofyou

C.makealotofnoiseD.chooseanotherone

4.Themosquitobitesyou.

A.whenyou'reasleepB.becauseyouhavechooseit

C.tooquicklytoletyouknowD.butdoesn'tlikeyou

5.Whichofthefollowingsentencesiswrong?

A.Theitchingbeginsafterthemosquitobitesyou.

B.Youfeelterriblewhenthemosquitobitesyou.

C.Mosquitoesusebloodtolayeggs.

D.AHthemosquitoesdon?tliketobitepeopleforblood.

Passage9

We'vetalkedaboutsnails（蜗牛）andtheirslowmove.Butmuchofthe

timesnailsdon'tmoveatall.Theyareintheirshells（壳）一sleeping.

Hotsunwilldryoutasnail'sbody.Soattheleastsignofhotsun,asnail

drawsitsbodyintohisshell.Asnailwilldieinaheavyrain.Sowhenit

rains,asnaildoesthesamething,too.Asnailcansleepforaslongasit

needsto.Itspendsallthewintermonthsinitsshell,asleep.

Inthespringthesnailwakesup.Itsbody,aboutthreeincheslong,

comesoutfromtheshell.Whenhungry,thesnaillooksforfood.Itseyes,

attheendofthetopfeelers（触角），areveryweak.Butitssense（感觉）of

smellisverystrong.Ithelpsthesnailtofindfoodandthenewgreens.

Asnail'smouthisnobiggerthanthepointofapin（大头针）.Yetithas

256,000teeth!Theteethareverysmall,andyoucan'tseethem.Ifyou

putasnailinahardpaperbox,itwilleatitswayout!Andifasnailwears

outitsteeth,itwillgrownewones.

l.Asnail.

A.movesmoreslowlyatnightB.hasthousandsoffeet

C.doesn'tmoveatallD.sleepsmuchofthetime

2.1nthesentence“Asnaildrawsitsbodyintoitsshell”,theword"draw"

means.

A.tomakewithapencilB.topushC.topullD.tomoveaway

3.Fromthestory,weknow.

A.asnail'sshellisverythinB.asnailcan'tseewell

C.asnail'snoseisquiteshortD.asnail'sbodychangesindifferent

seasons

4.Asnailgoestosleepwhen.

A.itfeelshungryB.itisputintoapaperbox

C.springiscomingD.itrainsheavily

5.Whichofthefollowingiswrong?

A.Inwinterthesnaildoesn'teatormove.

B.Asnaildoesn'tlikelivingunderthesun.

C.Thesnail'steethcan'tbewornout.

D.Thesnail'snosehelpstofindfood.

Passage10

Jupiter'sMoonsandHowTheyTravel

ThemanymoonsofJupitertravelaroundtheplanetindifferent

directions(方向).

Jupiteristhelargestplanetinoursolarsystem.Overtheyears,

scientistshavefoundthatJupiterhasitsownsmallsolarsystem.Earth

hasonemoon.Jupiterhasatleastsixteenandprobablymore.

Sincetherearesomanymoons,scientistsbegantonumberthem.The

numerals(numbers)tellthesequence,ororder,inwhichthemoonswere

found.Theywereslowertonamethemoons.AllofJupiter'smoonsnow

haveanameaswellasanumber.

Thefirstfivemoonstobediscoveredareknownasthe“innermoons^^.

Buttheyarenottheclosesttotheplanet.Theclosestisonly127,600

kilometersawayfromJupiter.Alltheinnermoonscircletheplanetin

counter-clockwisedirection,thatis,oppositeofthehandsofaclock.

Jupiter'smiddlegroupofmoonsareatleast11,100,000kilometers

fromtheplanet.Theyalsomoveinacounter-clockwisemotion(moving).

Thefourfarthestmoonsareatleast20,700,000kilometersaway.These

arecalled“outermoons”.Theycircleinaclockwisemotion.

Howmanymoremoonsdoyouthinkwillbediscovered?

l.Whatdoes“solarsystem“inthisarticlemean?

A.银河系B.宇宙空间C.流星雨D.太阳系

2.Thingsthattravelinthesamedirectionasthehandsofaclockaresaid

tobetravelingina.

A.clockwisedirectionB.counter-clockwisedirection

C.samedirectionD.differentdirection

3.Jupiter'sgroupofmoonstravelinaclockwisedirection.

A.planetsB.innerC.middleD.outer

4.ThenumbersgiventoJupiter'smoonstell.

A.theorderinwhichtheywerediscovered

B.theorderinwhichtheytravel

C.theorderoftheirdistancefromJupiter

D.theorderofnames

5.Accordingtothepassage,whichofthefollowingstatementsistrue?

A.NoneofJupiterJsmoonshavenames.

B.MostofJupiter'smoonscircleclockwise.

C.Jupiter'sinnermoonswerediscoveredfirst.

D.Jupiteristhenearestplanettotheearth.

6.HowfarawayarethemiddlegroupofmoonsfromJupiter?

A.It'snotmentioned.B.11,100,000kilometersaway.

C.127,600kilometersaway.D.20,700,000kilometersaway.

Passage11

WHYISTHESUNIMPORTANT?

Thesunisahuge,hot,brightstar.Itisimportantbecausewithoutit

therewouldbenolifeonEarth.Thesungivesuslightandheat.

Alllivingthingsneedlightandheatfromthesuntolive.Plantsneed

lightandheattogrow.Theyusethelightfromthesuntomakefood.We

cannotmakeourownfood,butplantscan.Allthefoodweeatcomes

fromplantsinafoodchain（链）whichstartswiththesun.Forexample,

Animalsneedsunlight,too.Justlikeus,theirfoodcomesfromafood

chainwhichbeginswiththesunandtheplants.

sunfleaffcaterpillar（毛虫）fbird

sunfseaweed（海藻）fsmallfishfwhale（鲸）

Sunlightmeanswecanseeduringtheday.Iftherewasnosun,itwould

bedarkallthetime.Evenwhentheskyiscloudy,thesunlightisvery

stronganditshinesthroughtheclouds.

1.Whichwordstelluswhatthesunislike?

A.Huge.B.Hot.C.Bright.D.Allabove.

2.Whatarethetwomainthingsthesungivesus?

A.Lightandheat.B.Heatandeggs.

C.Cornandlight.D.Wheatandbread.

3.Whycanwestillseeduringthedaywhentheskyiscloudy?

A.Becausewecanseealldayandallnight.

B.Becausethesuncan'tgiveuslightalldaylong.

C.Becausethesunlightcanshinethroughtheclouds.

D.Becausewecan'tseeatnight.

4.A11thefoodweeatcomesfrom.Anditstartswiththe.

A.plants;earthB.afoodchain;sun

C.food;sunD.plants;star

5.Inwhatwaydoyouthinkthesuncannotbeharmful（有害的）？

A.Thesuncandoharmtoyoureyesandskin.

B.Itcanmakeriverstoodry.

C.WithoutittherewouldbenolifeonEarth.

D.Hotsunondrylandcancausefires.

Passage12

Mostanimalsonlyhaveanimalsofadifferentkindforfood.But

sometimestwokindsofanimalscometogetherinapartnership（伙伴关

系）whichisgoodforthem.Youmayhavenoticedsomebirdsonthe

backsofsheep.Thisisnotbecausetheywantaride,butbecausethey

findeasyfoodintheparasites（寄生虫）onsheep.Thesheepletthebirds

dosobecausetheycanstoptheparasitesfromtroublingthem.Sothough

theycandowithitbythemselves,theycandobettertogetherwitheach

other.

Sometimesananimalhasaplantpartner.Therelationshipdevelops

untilthetwopartnerscannotdowithouteachother.Thisissoincoralsof

thesea.Insidetheirbodiestheyhaveverysmallplants,whichactas

“cleaners"，takingtheuselessthingsfromthecoralandgivingoxygenin

return.Thatiswhattheanimalneedstolive.Iftheplantsarekilled,orare

evenkeptfromreceivinglightsothattheycannotliveasusual,thecorals

willdie.

l.Somebirdsliketositonasheepbecause.

A.theycaneatitsparasites

B.theyenjoytravelingwiththesheep

C.theycan'tlivewithoutitsparasites

D.theywanttofindthewarmplace

2.Theunderlinedword"they"inthefirstparagraphmeans.

A.birdsandparasitesB.birdsandsheep

C.parasitesandsheepD.birds,parasitesandsheep

3.Welearnfromthepassagethatcoralsneedplantsfor.

A.friendsB.lightC.foodD.oxygen

4.TheChinesefortheword“oxygen"is.

A.氧气B.空气C.废气D.二氧化碳

5.Whatisthesecondparagraphmainlyabout?

A.Someanimalsandplantscannotlivewithouteachother.

B.Someanimalsandplantscannotdeveloptheirfriendshipeasily.

C.Someplantseateachother.

D.Someanimalslivebettertogether.Email:EduHot@Gmail.Com

Passage1

【答案与解析】这篇短文讲述了某些生物的迁移这一自然现象，并分

析了迁移的原因。科学家们最近又研究了龙虾海底成群结队迁移的现

象。它们选择在每年天气不好的季节里进行迁移，其中的原因及迁移

的目的，科学家尚未弄清楚。

LC.起初一看，四个选项好像都在文中叙述过，但仔细分析题干中的

“mostanimals"这一关键词语，便可排除其它选项。在第一段最后

一句中可找到答案的出处。

2.Ao有关“salmon”的情况在第二自然段中作了叙述。这种鱼出生

在淡水中，后不到咸水地区居住，在那里度过一生中绝大部分时光。

到老了以后又回到它出生之时的淡水之中。仔细分析题干中的“spend

alonglife”和短文中的关键句"Thereitspendsitslife.”便可断定答

案为Ao

3.Bo“theyleavetheirmountainhomeswhentheybecometoocrowded.v

一句是答案的出处。

4.Bo该题答案的出处是文章的第三自然段。文中说，龙虾是在海底

成群结队游动的时间是每年天气不好的季节，目的及它们到哪里去谁

也不知道，余项与文章叙述不符。

5.Do文中第二自然段叙述了“salmon”和北欧的一种老鼠迁移方向

和原因；第三自然段叙述了龙虾的游动情况，但原因不知道。最后一

段开头一句正是对本文主题的概括。Email:EduHot@Gmail.Com

Passage2

【答案与解析】本文向我们介绍了有关彗星方面的知识。与地球一样，

彗星也是绕太阳旋转的，它本身不发光，靠反射太阳的光而发亮。短

文中还介绍了彗星的成因，它拖着的长尾巴是如何形成的以及著名的

哈雷彗星名字的由来。

l.DouLiketheearth,acometgoesroundthesun,but,,<v是判断本题的

根据。

2.Co根据“,•,iswaterfrozenintopiecesoficeandmixedwithironand

rockdustandperhapsafewbigpiecesofrock.”这句话即能得出答案。

3.Do由第五段的首句"Manypeopleperhapshaveseenacomet.v可知。

4.Co“Somecometsmoveoutofoursightandnevercomeback.Others

ke叩comingbackatregulartimes.v一句是答案的出处。

5.Co哈雷彗星每七十六年才能看到一次。再结合“…thelasttimeit

cameclosetothesunandtheearthwasintheyear1986.”这句话的意

思，即可得到答案。

Passage3

【答案与解析】这篇短文介绍的是有关植物年轮方面的小知识。由于

树木的生长要受到阳光、降水等方面的影响，从一棵树上的年轮分布

情况上，可以推断出树木所生长地方以前的气候状况。年轮不仅对科

学家研究地球上的气候环境有非常重要的参考价值，而且更为有趣的

是，它还能帮助科学家们研究人类的历史呢。

l.Ao“Ifthetenthringisfarfromtheeleventhring,thenwe'resurethat

itwassunnyandrainymostofthatyear.”——句即是答案所在。

2.Co文章第一段"Doyouknowtheycantelluswhattheweatherwas

like…”和第三段的首句"Treeringsareimportantnotonlyforstudying

thehistoryofweather,”都有所暗示。

3.Ao答案就在a••,tofindouttheweatheroftenyearsago,countthe

ringsofatreefromtheoutsidetotheinside.Ifthetenthringisfarfrom

theeleventhring*',v一句中。

4.Do短文最后一段说，人们建房做饭都离不开树木。人所居住的周

围环境中如果没有了树木，那么人也就迁移了。所以答案为D。

5.Bo根据最后两段所叙述的内容，再联系植物对人类的重要作用，

则不难得出答案。

Passage4

【答案与解析】土壤是人类赖以生存的自然条件之一。没有了土壤或

者是土壤受到了较为严重的破坏，就会直接危及到人类的生存。本文

在阐述土壤的成因、特性和重要性之后，呼吁大家都要保护土壤。

l.Do综合考虑第一段的意思，唯有D才是最恰当的选项。

2.Co根据“Thisdarksoilishumus,deadleaves,deadplantsandanimal

wastemakeit,butthistakesalongtime.”一句所述，可推知这是一种

由落叶、枯萎的植物以及动物的粪便在长时间的腐烂后所产生的一种

东西。由此不难得出答案为C。

3.Do答案就在uPeopleshouldgrowmoreandmoretreesandgrassto

stopwindfromcarryingthehumusaway.”这一句话之中。

4.Do由“Whenthehumushasbeenmade,plantscangrowwellinit.”

和“Ittakeshundredsofyearstomakehumus,"这两句话所表达的意思，

可知答案只能是D。

5.AO本文就是说明土壤对人类的重要性的。事实上，文章结尾的那

句话已经点明主旨。

Passage5

【答案与解析】在大海的温水区域，我们常常可以发现一些珊瑚岛。

本文向我们描述了珊瑚岛形成的自然过程。文章最后，作者有感而发，

以问句结束全文，发人深思，耐人寻味。

l.Bo文章第一段就是讲的“在海中较暖和的水域，常有一些珊瑚岛”

这一事实。A显然是不对的。

2.Co根据“Acoralislandisverynicetolookat.Itlookslikearingof

landwithtrees,grass,andflowersonit.”这句话不难得出答案。

3.Do答案即在“Ineachoftheseholesaverysmallseaanimalhaslived.

Theseseaanimalsmakethecoral.”一句中。

4.Ao倒数第三段中的"Sometimesbirdsflewoveritandbroughtseedsto

theisland."这句话对此有明确的说明。

5.Co由这一小小的自然现象，作者联想到工作在平凡岗位上的工人

们，寓意非常深刻。作者的思想感情由最后一段作者的议论可以体会

到。

Passage6

【答案与解析】地震是地球上对人类生存构成威胁的最严重的自然灾

害之一。科学家们经过研究，发现了地震活动最频繁的地方。生活在

地震带地方的人们可以采取适当的措施减少其危害。也许，将来科学

家们能在地震之前预测出发生的地点和时间。

l.Do第一节最后的一句话是本题答案的出处。答案题时，尤其要注

意该句中的often一词。

2.Bo短文的"Whensomeplatesoftheearthmovesuddenly,an

earthquakeh叩pens"这一句明确告诉我们：地球板块突然移动时、就

导致地震的发生。选项A不是地震的成因，而是地震产生的结果。

这从“…theshakingsmakerocksrisesuddenlyandevencrackopen”一

句中可以看出。

3.Co地震带(earthquakebelts)是可能发生地震的地方。这由第三段的

中间儿句所描述的内容可知。

4.Ao将来科学家能预测出地震发生的时间和地点。有了这种精确的

预报，人们当然不会再对地震那