2026年人教版九年级英语上册 Unit5 Power of Ideas 课时练习题（含答案）

202阵秋人教版新教材九年级上册英语：Unit5PowerofIdeas课时练习题

SectionAWhatchangescaninventionsbringtoourlives?

第一课时(la-2d)

I根据句意及首字母或汉语提示填写单词

1.Laremoreconvenientthandesktopcomputersbecausewecancarrythemanywhere.

2.Theseccantakeclearphotoseveninlowlightconditions.

3.Themoviestaralwayswearsstoprotecthereyeswhenshegoesout.

4.Look!Three(扣子)weremissingfromhisshirt.

5.We'dbetternotuse(塑料的)bagsinourdailylives.

n用括号内所给单词的适当形式填空

6.Sir,thereareacoupleof(file)foryoutoreadfirst.

7.Anew.(print)wasboughtbyourclasstoreplacetheoldone.

8.Becauseofthesemodern(invent),ourlifeisbecomingmuchmoreconvenientthanbefore.

9.Thedogcanopenthedoorby.(it)withoutanyhelp.

lO.Thousandsofcars(produce)inthisfactorylastyearduetoadvancedtechnology.

Ill根据汉语提示完成句子(每空一词)

11.几百年前，生活比现在简单得多。

ago,lifewasmuchsimplerthanitistoday.

12.这辆高速列车每天都被仔细检查，以确保乘客的出行安全。

Thiscarefullyeverydaytomakesureofpassengers'travel

safety.

13.这些精美的剪纸可以由民间艺人制作而成。

Thesebeautifulpaper-cuttingsfolkartists.

IV补全对话

根据下面对话中的情境，在每个空白处填入一个适当的语句，使对话恢复完整。

(AandBareinamuseum.)

A:Lookatthisinterestingthing.It'ssobigandstrange.1.?

B:Oh,il'sagreatinventioncalledtheancientwaterwheel(水车).

A:Theancientwaterwheel?2.?

B:IthinkitwasinventedintheHanDynasty.

A:3.?

B:Guess,please!

A:Wasitusedfbrhavingfun?

B:No.Itwasusedforcarryingwaterfromtheriver.

A:Oh.Isee.Buthow?

BiLet'saskourteacher.Heisalearnedmanandhemayknowtheanswer.

A:OK.4.?

B:1thinkit'samazing.

A:5..TheChinesearesogreat!

第2页共24页

第二课时（3a-3d）

I根据句意及首字母或汉语提示填写单词

1.IncandescentlightbulbswereibyThomasEdisonover100yearsago.

2.ShestudiesIbecauseshewantstotraveltoRomenextsummer.

3.Thosefamousafromdifferentcountriesheldapaintingexhibitioninourcitylastmonth.

4.Marathonrunnersneedtocoveralong（星巨离）of42.195kilometres.

5.Thedictionarywillserveasanecessarytoolandbridgefor（传播）weiqiculture.

II单项选择

（）6.Thenewrulewillhaveagreat.onpeople'sdailylives.

A.resultB.reason

C.effectD.decision

（）7.Thisnewlibraryprovidesbooksforchildren.ltoffersdifferentkindsofafter-schoolactivities

A.aswellB.forsure

C.alsoD.either

（）8.Theworld'sfirstpracticaltelephonebyAlexanderGrahamBellin1876.

A.inventedB.wasinvented

C.isinventedD.invents

in用方框中所给单词的适当形式填空（每词限用一次）

changesuddencallworksecond

9.ThebookHarryPotterislovedbychildrenallaroundtheworld.

lO.TheseAIhelperscanprocessalotofinformationintofindthebest.

1l.Wcweretalkingaboutthepicnicplanhappilywhenthedooropened.

12.Theweatherquicklyinspring.Bringajacketjustincaseitgetscolder!

13.Theinventionofthelightbulbmadeitpossibleforpeopleandreadatnight.

IV根据汉语提示完成句子（每空一词）

14.因为大雨，我们学校取消了运动会。

第3页共24页

theheavyrain,ourschoolcancelledthesportsmeeting.

15.去年去日本旅行期间，我第一次尝试了寿司。

ItriedsushiduringmytriptoJapanlastyear.

16.足球是一项在全世界都很受欢迎的运动。

Footballisaverypopularsport___________________________

17.丝绸之路对世界产生了巨大的影响，如今依然可见。

TheSilkRoadtheworldthatwecanstillseetoday.

18.这位科学家经过多年研究，提出了回收塑料瓶的想法。

Thescientistrecyclingplasticbottlesafteryearsofresearch.

V阅读理解

AIhaschangedourlives.TherearefourusefulAIinventionshere.

Jiuge

TheAlcanremember900,000Chinesepoemsclearly.What'smore,itcanwriteapoeminaveryshort

time.InaCCTVshow,Jiugebeatthreegreatpoemfansfromafamouscollege.

Forpheus

Theping-pongrobotcanplayinaneasywaywithabeginnerandadifficultwaywithabetterplayer.

What'smore,itnotonlyencouragesplayerswithwordslike“Goodjob!”butalsogivessomegoodadvice

toimprovetheirskills.

Self-drivingAI

Itcandrivethecarmoresafelythanhumans.ltdoesn'tdrinkwineandneverfeelstired.ltcandowhatwe

humansdo.Forexample,ifacarwiththisAIhaspassedanothercar,itwillflashtwowhitelightsfrom

sidetosidetoshowthankstothecar.

FacialRecognition(人脸识别)

ItisusedalotinmanyfieldssuchastheAccessControlSystem(门禁系统).TheACSwon'tleta

strangerinwithoutthehouseowner'spermission.Payingbyfacialrecognitioniscommonnow.The

policeinHangzhouevencaughtacriminalataconcertwithitshelp.

()1.Thetextismainlyabout,

A.robotsinourlifeB.AIinventions

C.self-drivingcarsD.paymentways

()2.WhyisJiugespecial?

A.Becauseitcanplaytheviolin.

第4页共24页

B.Becauseitcandrivecarssafely.

第4页共24页

C.Becauseit'sgoodatpoems.

D.BecauseitwasonCCTV.

()3.WhatwillForpheusdowhileplayingping-pong?

A.Itwillguesswhatjobtheplayerdoes.

B.ltwillbeangryiftheplayerisabeginner.

C.Itwillsay"Whatapity!"totheplayer.

D.Itwillchangeitswayofplayingaccordingtodifferentplayers.

()4.Whendoesthecarwithself-drivingAIflashtwowhitelightsfromsidetoside?

A.Whcnithastostop.

B.Whcnitwantstoslowdown.

C.Whenitisreadytospeedup.

D.Whenithaspassedothercars.

()5.Fromthepassage,wecanknow.

A.noonecanbeatForpheus

B.facialrecognitionhelpedthepolicecatchacriminal

C.Jiugehaswritten9(X),000poems

D.selfdrivingAIcanmakesubwaytrainssafer

第5页共24页

第三课时(GrammarFocus)

I用括号内所给单词的适当形式填空

LAsweallknow,(tour)helpspeoplelearnaboutdifferentculturesandplaces.

2.Thelakewascompletely.(freeze)inwinter,sowecouldskateonit.

3.Theprojectaboutsavingwaterwasfully.(complete)onschedule.

4.Metals(melt)sothatworkerscanchangethemintowhattheyneed.

5.Weweresupposed.(leave)schoolat8:30.butweleft15minutesearlier.

11根据汉语提示完成句子(每空一词)

6.全世界的人们都应该帮助保护自然、节约能源，以创造更美好的未来。

Peopleshouldhelpprotectnatureandsaveenergyforabetter

future.

7.这座小村庄通过一条去年修建的新公路与一座大城市相连。

Thissmallvillageabigcitybyanewhighwaythatwasbuiltlastyear.

8.那条关于和平的信息是一个小男孩在打扫旧公园时发现的。

Themessageaboutpeaceayoungboywhilehewascleaningtheoldpark.

9.我最喜欢的书昨天从书桌上消失了，所以它一定是被某个喜欢读书的人偷走了。

Myfavouritebookdisappearedfrommydeskyesterday,s。itbysomeone

wholikesreading.

Ill按要求完成下列句子(每空一词)

10.Therearemanysportsmatchesonthesportsfield.(改为同义句)

Manysportsmatchesonthesportsfield.

1l.Heputhiswatchonhisclassmate'sdeskbymistake.(改为被动语态)

Hiswatchonhisclassmate'sdeskbyhimbymistake.

I2.Nowadayswecanonlyseeafewpeoplefishingwithcormorants.(改为被动语态)

Nowadaysonlyafewpeoplecanfishingwithcormorants.

IV语法填空

阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。

Thetelephoneisoneofthemostimportant1.(invenl)inhumanhistory.Haveyouever

wondered2.inventedit?AlexanderBellis3.(wide)credited(认为是...的功

劳)withtheinventionofthetelephone,butlittleinformationisavailableabouttheexactdate4.

itwasinvented.

第6页共24页

Thefirstsuccessfultelephonecall5.(make)byAlexanderBell.Sincethen,telephones6.

(develop)andimprovedsignificantly.Nowadays,weusesmartphones,whicharemuchmore

advancedthantheoriginaltelephones.

Bell'sinventionchangedthewaysof7.(communicate).Peoplenolongerhadtorelyon

writinglettersandwaitfordaysorweekstoreceivearesponse.Thankstothetelephone,wecan

communicateimmediately,connectingwithfriendsandfamilynomatterwheretheyarcintheworld.

Thetelephonehaschanged8.(we)livesinmanyways.Ithasmadebusiness9.

(convenience),allowedustostayintouchwithlovedoneseasily,andprovidedus1().a

meansofaccessinginformationatourfingertips.

第7页共24页

SectionBHowdoweturnideasintoreality?

第四课时

l根据句意及首字母或汉语提示填写单词

1.Perhapstakingpianolessonsistooeforyoutoafford.

2.Withtherdevelopmentoftechnology,ourliveshavechangedgreatly.

3.Afteryearsofdreaming,visitingtheancientcitybecameawonderfulrforher.

4.Scientistshavedonelotsofresearchonthe(起源)oftheuniversetofindoutwhereitall

started.

5.Somepolice(官员)cametoourschoolyesterdayandgaveusaspeechonhowtokeep

safe.

II单项选择

()6.—Whichofthethreebooksdoyouwanttoborrow?

一..I'vealreadyreadallofthemanddon'tneedanynow.

A.NoneB.Neither

C.A11D.Either

()7.Hiscarelessnessintheexperimentabigmistake,whichmadehisteachervery

disappointed.

A.ledtomakeB.ledtomaking

C.ledmakingD.ledmake

()8.Theserioustrafficjam.theheavyrainlastnight,anditmanypeoplebeinglate

forworkthismorning.

A.resultedfrom;resultedin

B.resultedin;resultedfrom

C.resultedfrom;led

D.ledto;resultedfrom

m用方框中所给单词的适当形式填空(方框中有两个词为多余项)

shapeofficecreatesolveresponsible

nonecheap

第8页共24页

9.Herpaintingofmountainvillagesisabeautiful.fulloflove.

10.Amongallthenewwatchesinthestore,isfitformyfather.

1l.Weshouldlearntobeapersonwhenwegrowup,nomatterwhathappens.

12.Theclothesinthissupermarketarethanthoseinthemall,andthequalityisgood.

13.Moststudentsbecameinterestedinscienceproblemsaftertheamazingexperiment.

IV根据汉语提示完成句子（每空一词）

14.青少年看屏幕时间过长可能导致视力下降。

Toomuchscreentimemaypooreyesightforteenagers.

15.她现在没做完作业，但之后会认真完成。

Shedoesn'tfinishherhomeworknow,butshewilldoitcarefully

16.我们得加快脚步，赶上前往乡下的早班车。

Weneedourstepstocatchtheearlybustothecountryside.

17.当班长意味着要负责帮助同学和老师。

Beingaclassmonitormeansclassmatesandteachers.

第9页共24页

第五课时(2a-3c)

I完形填空

ThestoryofThomasEdisonandtheincandescentlightbulbisoneofthemostfamousstoriesinthe

historyofinvention.However,thejourneyfromabrightideatoapractical1.isfarfromeasy.

ManypeoplesupposethatEdisonsimplyonedayhadagreatideaandmadeitwork.Butthe2.

wasthatheandhisteamtestedover1,600materialsforthefilament(灯,丝)beforefindingonethat

workedwell.

Edisonwas3.forleadinghisteamatMenloPark.Hebelievedthatsuccesscomesfrom1%

inspirationand99%perspiration(汗水).Thisstrongbelief4.thousandsofexperiments,

mostofwhichendedinfailure.Insteadofseeingtheseasawasteoftime,he5.themassteps

closertosuccess.Heoncesaid,"Ihavenotfailed.I'vejustfound10,000waysthatwon'twork."

The6.ofalong-lasting,practicallightbulbdidn'tjusthappenovemight.ltrequired7.

thinkingandarefusaltogiveup.Whenothersthoughtitwas8.,Edisonsawa

challengetobeovercome.He9.improveduponhisdesigns,makingeachversionalittlebetter

thanthelast.

Finally,aftercountlesstests,theyfoundthatacarbonizedbamboofilamentcould1().forover

1,200hours.Thisbreakthrough11.thewayfbrwidespreadelectriclighting.ltchangedthe12.

peoplelivedandworked,makingnightsasproductiveasdays.

Edison'sstoryteachesusthattrue13.oftencomesfromcontinuouseffortandthecourageto

facedifficulties.Everytimeweturnonalight,weshouldremembertheincrediblejourneybehindthis

everyday14..Itremindsusthateventhemostbrilliantideasneedhardworktobecomea15.

01.A.discoveryB.creation

C.decision□.suggestion

()2.A.drcamB.plan

C.fact□.opinion

()3.A.usefulB.thankful

C.responsibleD.ready

()4.A.ledtoB.lookedfor

C.gaveupD.putoff

()5.A.refusedB.accepted

C.avoidedD.forgot

第10页共24页

()6.A.priceB.size

C.inventionD.sale

()7.A.creativeB.traditional

C.simpleD.strange

()8.A.impossibleB.necessary

C.wondcrfulD.casy

()9.A.suddenlyB.carefully

C.quickly0.finally

()10.A.waitB.last

C.stopD.stay

Oil.A.askedB.paved

C.blocked□.cleaned

()12.A.reasonB.place

C.timeD.v/ay

()13.A.luckB.success

C.beautyD.health

()14.A.gameB.object

C.toyD.gift

()15.A.memoryB.reality

C.hobbyD.choice

II阅读理解

Aboylituphisfamily'stentwithelectricitythathemadehimselfbyusingtwofanshefoundatamarket.

Becauseofhistalenkhisneighboursinthetentcampcalledhimfc4LittleNewton^^.

"Newtonwassittingunderanappletreewhenanapplefellonhishead.Andweherearelivingin

darknessandtragedy(悲居U),andshells(炮弹)arefallingonus,soIthoughtofcreatinglight,and

didso,"Al-Attarsaidtothereporter.

TheAl-Attarfamilyconnectedtheirtenttothesideofahouse,allowingtheboytoclimbontotheroof

andsetuphistwofanstochargebatteries(给电池充电).Then,helinked(连接)thefanstowires

(电线)runningdownthroughthehouseandusedswitches｛开关)，lightbulbsandathinpieceof

woodinthetenttomakelightingforhisfamily.

Ittookhimawhiletosucceedfinallyafterhisfirsttwotriesfailed.

第11页共24页

“IwasveryhappythatIwasabletomakethisbecauseIeased(减轻)thesufferingoftheconditions

thatwelivein.Iamveryhappythattheycallme'LittleNewton',becauseIhopetoachievemydreamof

becomingascientistlikeNewtonandcreatinganinventionthatwillbenefitnotonlythepeopleherebut

thewholeworld,nAl-Attartoldthereporter.

()16.WhywasAl-Attarcalled"LittleNewton"byhisneighbours?

A.Becauseanapplefellonhishead.

B.Becauseheinventedalightbulb.

C.Becauseheusedfanstomakee加ctricity.

D.Becausehediscoveredanewsourceofenergy.

()17.Howdidtheboysetuphisfans?

()18.WhichofthefollowingisAl-Attar'shope?

A.Sellinghisinventiontobecomerich.

B.Callingahalttowarsallovertheworld.

C.Helpinghiscountrywinthewar.

0.Makingsomethinggoodforthewholeworld.

()19.WhatarethebestwordstodescribeAl-Attar?

A.Calmandrelaxed.

B.Cleverandhopeful.

C.Outgoingandfocused.

D.Politeandshy.

Ill阅读表达

In1876,AlexanderGrahamBellmadeagreatinvention-thetelephone.Forthefirsttimeinhistory,

peoplecouldtalktosomeonefarawayjustliketheywereinthesameroom.Buttoday,phonescando

muchmorethanjustmakecalls!

Thestoryofmobilephonesbeganwithtwo-wayradios.Theseearlydevices(设备)hadabig

problem-theyonlyworkedwhenpeoplewereclosetoeachother.Inthe1940s,smartscientistsfounda

way.Theybuilttallradiotowersacrossthecountrytopasssignals(信号)easily.

Everythingchangedin1973whenDr.MartinCoopermadethefirstrealmobilephonecall.Duringthe

1980s,mobilephonesbecamesmallerbutwerestillveryexpensive.Onlyrichbusinesspeoplecould

affordthem,andthephoneslookedlikebigplasticbricks.

第12页共24页

The1990sbroughtanotherbigchange.Phonesbecamecheaperandsmaller,fittingeasilyinpockets.

Soon,almosteveryonehadone.TextmessagingbecamepopuIar.Peoplestartedwritingshortmessages

insteadofmakingphonecalls.Meetingtimebecamemoreflexible(灵活的)becauseyoucouldjust

textuI'llbe15minuteslate.^^

Nowwchavesmartphones—likepowerfulmini-computersinourpockcts.Wcusethemtotakephotos,

watchvideos,playgames,andevenhelpwithhousework!Messagingappsletussendvideosandlong

messageseasily.Whilephoneshelpusstayconnected,somepeopleworrywespendtoomuchtimeon

them.

Lookingback,it'samazinghowphoneshavechanged.FromBell'ssimpletelephonetotoday's

smartphones,thishastrulychangedourlives.Whatwillphonesbeabletodonext?Onlytimewilltell!

20.WhendidAlexanderGrahamBellinventthetelephone?

21.Whydidscientistsbuildtallradiotowersinthe1940s?

22.Whomadethefirstrealmobilephonecall?

23.Howcansmartphoneshelpusinourlife?(请给出两个例子)

24.Whatdoyouthinkthefuturephonesmightbelike?(请自拟一句话作答)

IV用括号内所给单词的适当形式填空

I.Manytech(company)aretryingtodevelopAIproductstomakepeople'sliveseasier.

2.Since1964,YuanLongpinghasworkedtoincreasethe(produce)ofrice.

3.Nowadays,electroniclocksare.(wide)used,whichmeanspeopledon'tneed(ousekeysto

entertheirhouses.

4.Thankstotheheroesinhistory,societyhasdevelopedso.(rapid).

5.Mostteenagerscan't(buy)expensiveelectronicproductswiththeirpocketmoney.

V根据汉语提示翻译句子

6.他没有通过考试。因此他决定更加努力学习。(asaresult)

第13页共24页

7.令我惊讶的是，一个名叫李华的人因其善良而在社区里广为人知。(toone'ssurprise)

8.她可以在学校聚会上弹钢琴或唱歌。(either..or..)

9.该工厂每月可生产数百辆玩具车。(canbedone)

10.似乎这些脏衣服昨天就被洗了。(Itseemedthat..)

VI短文填空

根据短文内容，用方框中所给词的正确形式填空，使短文完整、正确。

goodhelprapidincludesuitablereal

feelpaintbutshe

Emmaisacreativegirlwholovessolvingproblems.Oneday,herlittlebrothercomplainedthathistoys

alwaysfelloffthetable.Emmadecided1.him.Shethoughtforawhileandcameupwithan

idea:Shewouldbuildasmallshelf.

Emmagatheredsomematerials,2.wood,nails,andahammer.Shechosecheapbut3.

materialstokeepcostslow.Sheworkedcarefullyandslowlytomakesureeverythingwas

pcrfcct.Hcrbrotherwatchedherandasked,"Howdidyoulearntobuildthis?MEmmasmiledandsaid/I

learntitfromDad.”

Afterafewhours,theshelfwasready.lt4.brightcoloursbyEmma.Herbrotherwassohappy

thathehuggedherandsaid,"You'rethe5.sisterintheworldInEmmafeltproudandrealized

shelovedcreatingthings.

ThenEmmajoinedtheschoofsinventionclubandstartedworkingonmoreprojects.Shealwaysacted6.

forherideas.Herteachersaid,“Emma,youmightbecomeagreatinventoronedayFEmma7.

excitedandcouldn'twaittoshareherideas.

第14页共24页

Thatnight,Emmalayinbedandthoughtabout8..future.Shedreamtofcreatinginventions

thatcouldhelppeopleandmaketheworldbetter.Sheknewitwouldtakehardwork,9.she

wasreadytokeeptrying.Shehopedherdreamswouldbecomea10.oneday.Afterall,

inventingisallaboutcreativityandsolvingproblems.

第15页共24页

Unit5单元限时检测

I单项选择(8分)

()1.—Whatdoyouthinkisthegreatest?

一Theinternet.It'squiteimportantinourdailylife.

A.informationB.invention

C.invitationD.introduction

()2.Manyyoungpeoplecan'taffordhouses,becausethehousesaretoo.

A.strongB.large

C.differentD.expensive

()3.Smarthomeappliances(智能家电)areusedinpeople'shomesthesedays.

A.luckilyB.widely

C.totallyD.exactly

(4.1hewillsellhishouse,becausehehasgotajobabroad.

A.makeB.suppose

C.decideD.suggest

()5.—Whichisyourfavouritesubject,Chinese,mathsorEnglish?

—.1likephysicsbest.

A.NothingB.Neither

C.NoneD.Noone

()6.Myfamilycan'tafford.anewhouse.Therefore,wehavetobuyasecond-handone.

A.buyingB.tobuy

C.buyD.bought

()7.Studentstofollowtheteacher'sinstructionswhiletheyareinthelaboratory.

A.requireB.arerequired

C.requiredD.wererequired

()8.—Youknowwhat?JiangxiFlightUniversity.inNanchangin2023.

一I'msoproudofit.

A.setupB.setsup

C.issetupD.wassetup

第16页共24页

n完形填空(io分)

Manyinventionsweretheresultsofaccidents.Todayweregoingtolearnabouta9.

invention—theraincoat.Doyouknow10.itwasinvented?

Ithasbeenmorethantwothousandyearssincewebegantouseanumbrella.However,peopleoftenfelt

itnotconvenienttoholdanumbrella11.doingsomethingwithhands.Thentheraincoatwas

invented.

ItissaidthattheraincoatwasinventedbyMacintoshin1823.Macintoshwasa(n)12.inan

eraserfactoryinScotland.Oneday,hepouredtherubberliquid(橡胶液体)overhiscoatcarelessly

whenmakingerasers.Hewastoo13.tocleanitandwentbackhomewiththedirtycoat.On

thewayhome,ilrainedheavily.Macintoshdidn'thaveanumbrella,sohehadtorunhome14.

Whenhegothome,he15.thewetclothes.Tohissurprise,theareaofthecoatwithrubberover

itwasn'twet."Whynotmakearubberraincoat?,,Macintoshtold16..Thenextday,hebrushed

therubberliquidalloverhiscoat.Heworethe"rubbercoat'onrainydaysandtookawalkoutsidetotest

ifitcouldreallykeep17.therain.Surprisingly,theclothesinsidethe"rubbercoat"werenot

wetatall.Sotheraincoatwasinventedinthisway.

Therubberraincoatssoon18.inthemarket.Yearafteryear,peopletriedtoimprovethe

raincoats.Todayraincoatsarewidelyusedinourdailylife.

()9.A.beautifulB.colourful

C.usefulD.careful

010.A.whatB.how

C.whyD.where

Oil.A.afterB.until

C.whileD.before

012.A.scientistB.worker

C.astronautD.pilot

()13.A.cleverB.relaxed

C.tallD.busy

()14.A.suddenlyB.quietly

C.quicklyD.slowly

015.A.putoffB.puton

C.tookoffD.pickedup

()16.A.myselfB.himself

C.herselfD.yourself

第17页共24页

()17.A.onB.with

C.offD.in

()18.A.foundB.produced

C.appearedD.made

III阅读理解(16分)

A

Nineyearsago,HemanBekelereceivedagift—achemistryset.Heusedittomake"potions(药水)”.

Atthattime,onlyhisparentsknewhiswork.Now,attheageof16,therearealotmorepeoplewatching

hiswork.

InOctober2023,3MandDiscoveryEducationnamedHemanasthewinneroftheirYoungScientist

Challengewithaprizeof$25,000becauseheinventedasoapthatcouldonedaybeusedtotreatsome

kindsofskincancer(皮肤癌).

HemanwasborninAddisAbaba,thecapitalcityofEthiopia,inAfrica.HemovedtotheUSwithhis

familyat4.HeremembersseeingpeopleinAfricaworkinginthehotsunwithoutanyprotectionfortheir

skin,andthatcanbethemaincauseofskincancer.

Skincancertreatmentsusuallycostabout$40,000.Hemanwonderediftherewasacheaperway.He

thoughtofaddingaskincancermedicinetosoap.

"Whaiissomethingthateveryoneisabletobuy?"Hemanthoughttohimself/'Everyoneusessoapand

waterforcleaning.Therefore,soapwouldprobablybethebestchoice,"

Itcouldtakeyearsbeforethesoapisreadytobesold.ButHeman,the10thgraderatWoodsonHigh

School,isdetermined.Overthesummer,hespenteveryweekdayinalab.Whenhegoesbacktoschool

thisfall,he'llbeinthelablessoften.Buthellkeepworkinghardtomakehisdreamcometrue.

HemanencouragesallkidstodreambigJ'Justkeepinventingthings,"hesays."Keepthinkingofnew

waystoimproveourworld.”

()19.WhendidHemangetthechemistryset?

A.In2026.

B.About6yearsago.

C.WhenhewasintheIOthgrade.

D.Attheageof7.

()20.Accordingtothetext,what'sthemainreasonforskincancerinAfrica?

A.ThesunlightinAfricaistoostrong.

B.Africansaremorelikelytogetill.

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C.Africansdon'tprotecttheirskininthehotsun.

□.Africansusesoapforcleaning.

（）21.WhydidHemanchoosesoaptotreatskincancer?

A.Becauseit'scheapandeasytouse.

B.Becausehisparentslikeusingsoap.

C.BecausetherearemanysoapcompaniesinAfrica.

□.Becausehecanonlyfindsoapinthelab.

（）22.Whai'sihemainpurposeofthetext?

A.ToexplainwhymanyAfricansgetskincancer.

B.ToshowhowHernan'sparentssupporthiminmakingthesoap.

C.ToexplainwhyHernan'ssoapisbetterthanotherproducts.

D.TointroduceHemanandhisinvention.

B

Studentspasstheirschoolworkthroughdifferenthands,fromtheirgroupleaderstotheclass

representative（课代表），andfinallytothetcachcr.ltmightnotsoundtoodifficult,butsometimesit

cangowrongandtakesalotoftime.

Todealwiththisproblem,ZhangXiruifromShenzhenGezhiAcademyinGuangdongcameupwitha

usefultool-asmarthomeworkcollectionrobot.Thiswonhimfirstprizeinthe20thGuangdong

ProvincialChildren'sInventionAwards.

Therobotusesradiofrequencyidentification（RFID射频识别）technology——areaderandaspecialtag

（标签）thatcanshareinfbnnationwithouttouchingeachother.Thisway,itcanhelpfindandknow

whatitislookingfor.Eachstudent'snotebookhasaspecialRFIDtagwithhisorhernameandthe

subject.Studentsonlyneedtoplacetheirnotebooksontherobot,andthemachine"sees'thenotebook,

readsitstagandtakesthenameoutofthenamelist.uTeacherscancheckwhohasn'thandedin

homeworkbyconnectingtheirphoneswiththerobotthroughWi-Fi,"the13-year-oldboyexplainedto

ShenzhenSatelliteTV.

Now,he'splanningtodevelopathird-generationandhopestouseullra-high-frequency（超高频）radio

technologytoreadlotsofRFIDtagsfromfaraway.Thatm