北师大版（2023） 选择性必修第一册 Unit 3 Conservation Lesson 3 The Road to Destruction基础练习课件（3份打包）

第第页北师大版（2023）选择性必修第一册Unit3ConservationLesson3TheRoadtoDestruction基础练习课件（3份打包）(共17张PPT)

Unit3L3TheRoadtoDestruction基础练习01

Ⅰ.单句语法填空1.Thereisnodoubtthatthe(consume)arestillverysensitivetotheprice.2.Hisweaknessisthatheisvery(waste).3.Peopletrytoavoidpublic(transport)delaysbyusingtheirowncars.4.Thewindowsarevery(dirt).Theyhavenotbeencleanedforweeks.5.Ifyou(fill)something,youfillitagainafterithasbeenemptied.

consumers

wasterful

transportation

dirty

refill

6.WangWei’sbehaviourisofgreatimportanceinawakeningpeople’s__________(aware)ofhelpingothers.

7.MyfriendLilyshowedmealarge(collect)ofCDsthatevening.

8.(anxious),shetookthedressoutofthepackageandtriediton.

9.Theearthquake(destroy)eventhetallestbuildings.

10.Iwasgettingmoreandmore(annoy)andofcourse,themoreupsetIgot,thelessIwasabletoconcentrate.

awareness

collection

Anxiously

destroyed

annoyed

Ⅱ.完成句子

1.同其他十五万人在雨中跳舞怎么样

inarainyfieldwithonehundredandfiftythousandotherpeople

2.一般来说,照相机价格越贵,质量就越好。

,themoreexpensivethecamera,thebetteritsquality.

3.他们安然无恙地回家了。

Theyreturnedhome,.

4.在过去五十年里科学进步得很快。

Sciencegreatadvancesinthelastfiftyyears.

Howaboutdancing

Generallyspeaking

safeandsound

hasmade

Ⅲ.阅读理解

Naturehascreatedmanywaystoprotectcreatures’eyes.Themostcommonprotectionistheeyelid—afoldofskinthatclosesovertheeye,protectingitfromdamage.Eyelashesareusefulforkeepingoutdustandotherthings,andtearswashawayanysmallpiecesthatgetthroughtheotherdefenses.

eyelid[ald]n.眼睑；眼皮

眼皮子；眼盖；能够活动的眼皮盖

eyelash[al]n.睫毛

眼睫毛；假睫毛；塑料睫毛

bird’seyelid

鸟类的眼睑

Somecreatures,includingmostbirds,havethreeeyelids.Theupperandlowerlidsactlikehumanlidsandkeepoutlittletreebranches,dirt,andsand.Thethirdeyelid,however,isasemitransparenttissue(半透明组织)thatcrossesovertheeyefromtheinsidecornertotheoutsidecorner.Becauseofthisprotectivemembrane(隔膜),birdsseldomhavetoblink.Theyclosetheireyesonlywhentheygotosleep.Forducks,thisthirdeyelidservesasanunderwaterdivingmaskthathelpstheducksfindfood.

semi-美[sema]英[semi]pf.半；部分

pref.“半”；“部分”；一半；(一般时期中)出现两次的

semi-abstract半抽象semi-conductor半导体

transparent[trnspernt]

adj.透明的；清澈的；易识破的；易看穿的

天仙配；透明模式；透明色

blink[blik]

v.whenyoublinkorblinkyoureyesoryoureyesblink,youshutandopenyoureyesquickly

Mostfishandsnakeshavenoeyelidsatall.Instead,ahardglassycoveringprotectstheireyes.Forfish,waterconstantlysweepsawaydirtfromthecovering.Andasnake’seyesightisusuallysobadthatalittledirtobscuringitsvisiondoesnotdisturbitgreatly.

Eyelashesdefend(保护)theeyebyshadingitfromstronglight.Theyalsoactlikeminibrushestoremovedust.Camelshaveeyelashesthatarefourincheslongtoprotecttheireyesfromwind-blownsandinthedesert.

obscure[bskjr]

v.遮蔽；使(黑)暗；使难理解；搞混

adj.暗(夜)；黑夜里的；阴(天)；含糊的

n.朦胧；黑夜模糊；使暗；朦胧的

n.1.notknownabout,ornotwellknown

2.notclearlyexpressed,ornoteasytounderstand

v.1.tomakesomethingdifficulttounderstand

2.tocoversomethingsothatitcannotbeseen

disturb[dstrb]

v.打扰；干扰；弄乱；妨碍;扰乱；打搅；使不安

5.Whydon’tbirdsblinkoften

A.Theydon’tneedtosleepalot.

B.Theirupperandlowerlidscankeepawaylittlebranches,dirtandsand.

C.Eyelashesactlikeminibrushestoremovedust.

D.Theyhaveakindoftissuetocovertheeyes.

6.WhichofthefollowingstatementsisTRUEaccordingtothispassage

A.Ducksdon’tclosetheireyesevenwhentheygotosleep.

B.Alittledirtdoesn’tdisturbasnake’seyesightbadlybecauseitseyesightisverygood.

C.Eyelasheshelptokeepawaysmallpiecesthatgetthroughtheothertwodefenses.

D.Somecreatureshaveahardcoveringtoprotecttheireyesinsteadofeyelids.

7.Whatcanbeconcludedfromthepassage

A.Eyelidsaremoreimportantinprotectingcreatures’eyesthanotherdevices.

B.Creaturesdevelopdifferentmodesofeyeprotectionindifferentenvironments.

C.Birdsoftenclosetheireyesinthedaytime.

D.Afish’seyelidisahardglassycovering.

Ⅳ.七选五

BeaGreenGuest

Whenpeopletakeavacation,theyoftentakeavacationfromresponsibility,too.Ourbehaviorathotelsisoneofthebiggestproblems.Wehaveourlinen(亚麻织品)washeddailyforus,andareprovidedwithanendlessstreamofhotwater.Butallofthisluxuryequalsseriousconsequencesfortheenvironment.1.Theyofferprogramsandfacilitiesthatsavewaterandenergy.That’sagoodstart,butthereisalotmoreyoucandotocutdowntheamountofwasteproduced.

2.

F

F.Moreandmorehotelsarebecomingeco-friendly

B

B.Justsay“no”tohotelshampoo

InAmericaalone,thereareabout50,000hotels.Nowthinkifhotelmanagementputstwosmallbottlesforeachhotelroomeveryday,that’sahugeamountoflittleplasticbottlesthatmaynotevengetrecycled.Andwhataboutallofthatshampoowhenyoudon’tfinishthebottleAbetterwayistobringyourownshampoofromhome.

Turnoffthelights.

Youdoitwhenyou’reathome,rightDoitatthehotel,too.Studieshaveshownthat,inhotels,themajorityofenergyspentthroughlightingcomesfromthebathroomlightbeingleftonformorethanonehour!3,remembertohittheswitch!

Don’thaveyoursheetsortowelswashedeveryday.

D

D.Afteryou’redonewithyourbusiness

Sure,it’sluxurytohavelinenandtowelscleanedeveryday,butthat’sallitis.Washingasetofbedsheetsandapairofbathroomtowelsrequiresabout12-16gallonsofwater.Seeifthereisapolicyforrequestingthatyourtowelsandlinengetwashedweekly.Insomehotels,it’sassimpleashangingtowelsbackuponahook.4.

Thesetipsarealsousefulfortripstoafriend’sorrelative’shouse.5.Theywillalsosaveyourhostsalotofmoney.

G

E.Theywillsaveplastic,water,andelectricity

E

G.Inothers,youmayaskthefrontdeskforapersonalrequest

A.Thinkaboutbathroomfacilities

B.Justsay“no”tohotelshampoo

C.Whenyou’reusingthebathroom

D.Afteryou’redonewithyourbusiness

E.Theywillsaveplastic,water,andelectricity

F.Moreandmorehotelsarebecomingeco-friendly

G.Inothers,youmayaskthefrontdeskforapersonalrequest

Ⅴ.完形填空

Youngchildrenacrosstheglobeenjoyplayinggamesofhideandseek.Forthem,there’ssomethinghighlyexcitingabout1someoneelse’sglanceandmakingoneselfunabletobeseen.

However,weallwitnessthatpreschoolchildrenareremarkably2athiding.Theyoftencoveronlytheireyeswiththeirhands,leavingtherestoftheirbodies3.

1．A．followingB．takingC．escapingD．directing

2．A．cleverB．badC．scaredD．quick

3．A．exposedB．examinedC．untouchedD．imbalanced

Foralongtime,thisineffectivehidingmethodwas4asevidencethatchildrenarehopelessly“egocentric”(自我中心的)creatures.Butour5researchresultsinchilddevelopmentalpsychology6thatidea.

Webroughtyoungchildrenaged2-4intoourMindsinDevelopmentLabatUSC．Each7satdownwithanadultwhocoveredherowneyesor8.4．A．supportedB．guaranteedC．imaginedD．interpreted

5．A．disappointingB．mixedC．surprisingD．desired

6．A．explainedB．confirmedC．contradictedD．tested

7．A．parentB．childC．researcherD．doctor

8.A．feetB．noseC．handsD．ears

Wethenaskedthechildifshecould9orheartheadult.Surprisingly,childrenrepliedthattheycouldn’t.Thesame10happenedwhentheadultcoveredherownmouth:11childrensaidthattheycouldn’t12toher.

Anumberof13ruledoutthatthechildrenmisunderstoodwhattheywerebeingasked.Theresultswereclear:

9．A．seeB．helpC．reachD．fool

10．A．eventB．thingC．actionD．accident

11．A．YetB．NowC．SoonD．Once

12．A．speakB．listenC．turnD．wave

13．A．instructionsB．descriptionsC．experimentsD．assumptions

ruleoutna.排除

排除…的可能性；

划去；拒绝考虑

tostopconsideringsomethingasapossibility

Ouryoungsubjects14thequestionsandknew15whatwasaskedofthem.Their16tothequestionsreflectedtheirtrue17that“Icanseeyouonlyifyoucanseeme,too.”

14.A.comprehendedB.predictedC.exploredD.ignored

15.A.partlyB.honestlyC.vaguelyD.exactly

16.A.responsesB.approachesC.contributionD.sensitivity

17.A.abilityB．beliefC．identityD．purpose

Theysimply18mutual(相互的)recognitionandregard.Our19suggestwhenachild“hides”byputtingablanketoverherhead,itisnotaresultofegocentrism.Infact,childrenconsiderthismethod20whenothersuseit.

18.A.holdbackB.relatetoC.insistonD.makeup

19.A.limitationsB.requirementsC.theoriesD.findings

20.A.tentativeB.impressiveC.creativeD.effective

holdback

na.阻止；踌躇；隐瞒；抑制

退缩；控制；退缩不前

tentative[tnttiv]n.试探；尝试；实验

adj.实验性的；不确定的；尝试的；没有把握的暂时的；试探性的；试验性的(共16张PPT)

Unit3L3TheRoadtoDestruction基础练习02

Ⅰ.单词拼写1.Iboughttheflowersfromastoreandwthemneatly.2.Thesofanutoraneggisthehardcoveringwhichsurroundsit.3.Ifyou(咽下)something,youcauseittogofromyourmouthdownintoyourstomach.4.Somethingthatis(新颖的)isnewandoriginal.

wrapped

shell

swallow

innovative

5.Thereareasmanyas20jobsavailableinthiscompany,andyouarefreetochoosewhicheveryouthinksyoubest.

6.(常规的)colourTVbroadcastsweredelayedintheUKuntil1967.

7.Thelast(十年)oftheeighteenthcenturywasatimeofgreatsocialchange.

8.Atthesightofthiscruelty,theycouldhardlycontaintheir(愤怒).

9.Parentsarenaturallyafortheirchildren.

10.Rarecausingtrafficjamsinthecitycentre.

suits

Regular

decade

anger

anxious

Roadworks

Ⅱ.用适当的介词或副词填空

1.Dowewanttogetsomewhereordowewanttogetstuck_____therut(车辙)

2.WhygetstressedItwilljustmakethingsworse.

3.Thesetwoeventswererelatedeachother.

4.Theboybecameaddictedcomputergamesanddidn’twanttostudy.

5.Insteadshoutingemptyslogans(口号),itismoremeaningfultodonatebooksandsportsgoodstochildreninneed.

in

out

to

to

of

6.Itisimpolitetospeakwithyourmouthfullfood.

7.IhavearrangedforTomtopicktheexpertsattheairport.

8.Nomatterwhentheenemiescome,theywillbewipedclean.

9.Thereasonthefailureoftheexperimentwasthattheylackednecessaryexperience.

10.Itishightimethatwedidsomethingtoprotectthoseendangeredanimalsbeforetheydie.

of

up

out

for

out

Ⅲ.阅读理解

ManyofEarth’screaturesdiebecauseofhumans’choices.Thesechoiceshavenothingtodowithfoodorshelteroranythingelsethathelpshumanssurvive.（Whatkillsmillionsofanimalsallovertheworld）is（thathumanswanttomakemoneybydoingso）.

Peopleusepartsofanimalsforeverythingfromhatstohandbags,fromjewelrytoashtraysandtomakepowdersthatsupposedlyimproveaperson’slife.Decidingthataspeciesisendangeredandprotectingitbylawarenotalwaysenough.People（whokillwildlifeillegally）rarelygetcaught.

ashtray

powder

Duringthelate1980s,savingelephantsbecameapopularcause.Wildlifeprotectiongroupsmadesureeveryonesawpicturesorfilmsofelephantswiththeirfacescutofffortheirivory.Thesegroupsalsoprovedthatcertainpopulationsofelephantsweredecreasing.Asaresult,mostpeoplestoppedbuyingobjectsmadeofivory.Lawsagainstpoaching(偷猎)weremadestronger.Manycountriesmadeimportingivoryillegal.Killingelephantsfortheirivorybecamemoreriskyandlessprofitable(有利可图的).

ivory

However,concernforcertainspecieswillbecomeweakafterawhile.Inthelate1970s,peopleprotested(抗议)againstthekillingofsealbabies.Everyonewasshockedtoseeyoungsealsbeingkilledintheiricyhabitat.Thecruelactivitystopped.Buttenyearslater,thenumberofsealbabieskilledwashigherthanever.

seal

whale

dolphin

Otheranimalprotectionmovementshavecomeandgone,suchassavingthewhalesandprotectingdolphins.Thewhalepopulationappearstohaveincreasedfornow.Andthelaws

arefinallychangedinAmericatoprotectthe

dolphinsthatswimwithtunafishinpartsof

thePacificOcean.

Intheyearstocome,people’sattentionwillprobablyturntosomeotherendangeredspecies.Plentyofthemurgentlyneedattention.Duringthistime,willtheelephantsbeforgotten

tunafish

tunafish

1.Whatleadstothedisappearanceofmillionsofwildanimals

A.Thegrowinghumanpopulation.

B.Humans’hopeformakingafortune.

C.Humans’toomuchneedforwildfood.

D.Nothavingenoughlawsonwildlifeprotection.

2.Whatcanweinferfromthetextaboutwhathappenedinthelate1980s

A.Wildlifeprotectiongroupsdidmakegreatefforts.

B.Importingivoryinallcountriesisillegal.

C.Thosewhokilledelephantsallgotcaught.

D.Huntingwascompletelynotallowed.

3.Whyaresealbabiesmentionedinparagraph4

A.Toshowtheefforttoprotectsealbabies.

B.Toshowanincreasingnumberofsealbabies.

C.Toshowthedecreaseofworryaboutcertainspecies.

D.Toshowpeople’sprotestagainstthekillingofsealbabies.

4.Whatdoestheauthormeanbyusingtheunderlinedsentence

A.Humansshouldchoosesomerareanimalstoprotect.

B.Attentionmustbepaidtosavingsomeendangeredwildlife.

C.Successhasbeenachievedinquiteafewcasesofwildlifeprotection.D.Concernandmovementsforanimalprotectionshouldbealwayskept.

Ⅴ.完形填空

InOctober2023,ShahbeganpickinguprubbishfromthebeacheverySundaymorning.Atfirst,itwasjusthimandaneighbour,andthenhebegan1otherstojoinin.Wordspreadandwithhelpfromsocialmedia,morevolunteersgotinvolved.

Shahhasn’tstoppedsince.He’snowspent209weekends2thismissioninspiringmorethan200,0003tojoinhiminwhat’sbeencalledtheworld’sbiggestbeachclean-up.ByOctober2023,VersovaBeachwas4cleanandShah’sclean-upsexpandedtoanother5.

1.A.askingB.orderingC.warningD.forcing

2.A.comparingtoB.adaptingtoC.relatingtoD.devotingto

3.A.workersB.volunteersC.journalistsD.clerks

4.A.originallyB.finallyC.suddenlyD.theoretically

5.A.parkB.bankC.beachD.market

ForShah,theworkhasalwaysbeenapersonaljourney,butithasearned6attention.Afterhewashonouredasa“ChampionoftheEarth”bytheUnitedNationsin2023,Bollywoodcelebritiesandpoliticians7hismissionandjoinedinhisclean-ups.

Today,Shahisalsoworkingwithcoastalcommunitiesto8plasticpollutionatoneofthesources.Inareaslackingwastemanagementsystems,9oftenend(s)upinstreamsandriversthatemptyintothe10.

6.A.globalB.localC.nationalD.coastal

7.A.simplifiedB.changedC.acceptedD.finished

8.A.makeB.discussC.throwD.handle

9.A.treesB.materialsC.rubbishD.tools

10.A.oceanB.factoryC.mountainD.forest

Shahandhisvolunteers11andassistvillagersinreducing,managingandrecyclingtheirplasticwaste.

“Thisworld12toomuch.Ithinkyoumusttalklessanddoactionmore,”hesaid.“Everycitizenonthisplanetmustbeinforalongpull.Ifeelthe13todosomethingformyplanet,sothiswill14forlife.Ifeachonecouldstart,thisjourneycouldbecome15.Canwedoittogether”

11.A.protectB.controlC.scoldD.educate

12.A.talksB.complainsC.thinksD.argues

13.A.pityB.needC.painD.effect

14.A.comeonB.getonC.lookonD.goon

15.A.greatB.complexC.completeD.difficult

Ⅷ.语篇填空

Daisyisagirlwhocaresaboutourenvironment.Shealwayslongstohelp1.(endanger)speciesofwildlife.Oneday,she2._______(wake)upandfoundaflyingcarpetwhichtookhertomany3._______(place)toexperiencesomethingamazing.InTibet,Daisysawanantelopelookingsadandittoldherthespecieswasbeingkilled.Thenthecarpetshowedheraplace4.therewassomewildlifeprotection.

endangered

woke

places

where

Thereshecameacross5.elephant,fromwhomsheknewtheyusedtobehunted6.mercy.Butnowgoodthingsarebeingdonetosavelocalwildlife.Knowingthat,Daisyburstinto7.(laugh)inrelief.Attheendofthejourney,shemetamonkey8.(rub)himselftoprotecthimselffrommosquitoes.Themonkeyaskedhertopay9.(much)attentiontotherainforest.Finally,Daisy10.(full)understoodthemeaningof“norainforest,noanimals,nodrugs”.

burstinto+n.burstout+doing

an

without

laugher

rubbing

more

fully(共19张PPT)

Unit3L3TheRoadtoDestruction基础练习01

第一部分基础知识练

I.单词拼写

1.Theheavyrainhasbroughtgreat___________(破坏)totheroadsinthisarea.

2.Thecargot________(卡住)inthemudandwasunabletomove.

3.Therewasaheavytraffic________(阻塞)ontheroad,soIwaslateforwork.

4.Bettywasmuch________(烦恼的)tohearthatshehadfailedintheexam.

destraction

stuck

jam

annoyed

5.Whenheheardtherumours,________(怒气)filledhimup.

6.Inthelasttwo________(十年),alotoffactorieshavebeenshutdowninourcity.

7.Manypeoplesufferfrom________(癌症)becauseofairandwaterpollution.

8.Ireallycan’t________(联系)whathedoeswithwhathesays.

9.Shepays________(定期的)visitstoherparentsasshelivesnotfarfromthem.

10.Yourtiedoes________(适合)yourshirt.

anger

decades

cancer

relate

regular

suit

II.单句语法填空

1.Humansareontheroadto____________(destroy)astheydomuchdamagetotheearth.

2.Thebusgot_______(stick)inthesnowandcouldn’tmoveabit.

3.Ijustdon’tknowwhysheoftenreturnshome________(stress)out.

4.Thesenoisesarequite________(annoy)astheykeepusawakeallnightlong.

5.Studentswere_________(anger)atbeingtreatedlikechildren.

destructation

stuck

stressed

annoying

angry

II.单句语法填空

6.Shehassetashiningexampleofloyalserviceoverfour________(decade).

7.Itsbrainissmallin__________(relate)toitsbody.

8.Muchofthepovertyinthisareaisrelated_________diseases.

9.Thepurityofthewateristested_________(regular).

10.Themethodissuit__________massproductwithlowcost.

decades

relation

to

regularly

for

第二部分能力提升练

I.完成句子

1.Whenyouget_______(焦虑的),youshouldremembertotakeadeepbreath.

2.Iwaswatchingtheclockallthroughthemeeting，___________________________(因为我要赶火车)

3.Thismight_________________________(与……有关联)carbondioxideproductionaswell.

4.Inthelast10years，thenumberofcarsontheroads_______________(增加了)by30%.

5.Look,theboy_______________((对……着迷)thestory.

stressedout

asIhadatraintocatch.

berelatedto

hasincreased

isaddictedto

II.语法填空

AboutthesizeofJapan，theGreatBarrierReefevencan

1____（see）fromouterspace.Morethan25millionyearsold，itismadeupoflivingcoral2___（grow)ondeadcoral.Itishosttomanyspeciesofbirds3seacreatures.Butitisnowunder4（threaten）frompollutionandclimatechange.Inordertoprotectit，acaretakerwasselectedoutofthethousandsof5（applicant），whowasBenSouthallfromtheUK.Inaddition6blogging，takingphotosandwritingarticlesaboutthereef，hemadeanumberofappearancesontelevision7（argue）infavourofitsdefence.

beseen

growing

and

threat

applicants

to

toargue

Healso8（work）asapresenterfortheNationalGeographicChannel，beforegoingontowriteabookabouthisexperiences.The9（important）thingwasthatpeopleallovertheworldbecameawareofthebeautyoftheoceaninthearea.What’smore，theycametounderstandthedelicatebalancethattheenvironmentexistsinand10can，andmust，bedonetoprotecttheGreatBarrierReef.

worked

mostimportant

endlessly

delicate[delkt]

adj.精致的，微妙的，脆弱的，熟练的，柔和的

精美的；易碎的；娇弱的

what

第三部分阅读拓展练

I.七选五

CanAnimalsPredictEarthquakes

Thebeliefthatanimalscanpredictearthquakeshasbeenaroundforcenturies.In373B.C.，historiansrecordedthatsomeanimalsdesertedtheGreekCityofHelikeingroupsjustdaysbeforeaquakehittheplace.1Fishmovingviolentlyandchickensthatstoplayingeggswerereported.Countlesspetownersclaimedtohavewitnessedtheirdogsandcatsactingstrangelybeforethegroundshook.

E

Recordsofsimilaranimalforetellingofearthquakeshavesurfacedeversince.

2Itwasdocumentedinnewsreportsthatthreedaysbeforethe2023Sichuanearthquake，thousandsoftoads（蟾蜍）appearedonthestreetsinMianzhu，acityhitveryhardwhere2，000peoplewerekilled.Alsosnakesreportedlylefttheirhomesandheadedforsafetyseveraldaysbeforethedestructiveearthquake.

F

Wildcreaturesalsoshowvariouskindsofabnormalreactionsbeforeearthquakes.

3Sometheoriesarethattheyfeelmovements，orweak“shocks”，intheearthbeforehumansdo；orthattheybecomeawareofgasesgoingoutoftheearth.AnotherbeliefisthatanimalsareverymuchintunewithEarth’smagnetic（磁性的）field，sotheydetectelectricalsignalscausedbyelectromagneticfieldchanges，causingthemtopayattentiontothewarningthatanearthquakeisabouttohappen.

A

Exactlywhatanimalshavesensedcan’tbefullyunderstood.

TheUnitedStatesGeologicalSurveystatesthattherehasbeennoconcreteevidenceforthefactthatanimalbehaviorhasarelationshipwiththeoccurrenceofanearthquake.4Americanexpertsonearthquakesarealsoskeptical.Theythinkthatanimalsmayhavestrangebehavioratanytimeduetootherreasons—becausetheyarehungry，defendingtheir“countries”，orareabouttofaceadangeroussituation.5Theycontinuetofollowthe“anecdotalevidence”.

C

B

Theconnectionbetweenthemhasneverbeenscientificallymade.

anecdotal

美[nkdot()l]

adj.逸事的；趣闻的；传闻的

轶事的；轶闻；轶闻趣事的

Thehopeisthatonedaywhattheyhavelearnedwillprovetobeextremelyusefulinpredictingearthquakesmoreaccurately，thussavingmillionsoflives.

A.Exactlywhatanimalshavesensedcan’tbefullyunderstood.

B.Theconnectionbetweenthemhasneverbeenscientificallymade.

C.Otherresearchersaroundtheworld，however，havenotgivenupontheidea.

D.Itisnecessarytoknow