人教版（2023）必修 第二册Unit 3 The internet单元精练完形填空 练习含解析

第第页人教版（2023）必修第二册Unit3Theinternet单元精练完形填空练习(含解析）Unit3完形填空练习-2023-2024学年高中英语必修第二册单元精练（人教版2023）

一、完形填空

Mobilephonesarenoweverywhere.Theyarea(n)1wayforustokeepintouchwithfriendsandfamily.2,itisimportanttoknowthatthereare3timeswhenyoushouldnotbeusingyourphone,themostimportantofthesebeing4.

Thereisnoreasonwhyyoushouldfeelthe5tohaveyourmobilephoneduringclass.Aren’tyouatschoolto6Youshouldnobesendingyourfriendstextmessagesortakingphonecalls7youareinclass.

InAmericastudentswouldneverbe8tousetheirmobilephonesduringclass.Anyone,who9theruleworldbekickedoutofclassatonce.ItisOKtohaveyourmobilephonewithyou,butyoumust10toturnitoff.Itisvery11tohearalotoftonesandringingduringclass.

Asa(n)12inChina,Ihavetodealwithstudentsusingmobilephoneseveryday.Ihavetoldmyclasstoturnofftheirphones,butmanystudentsdonot13.Thedesiretobe14allthetimeseemstobestrongerthanthedesiretolearn.

It’s15tounderstandwhyitissotemptingtohaveyourphoneonduringclass,Itwon’t16anyonewhenyou’resendingashorttextmessage,willitButyoumay17behurtingyourselfwhenyoudothis.Sendingatextmessagealsotakesyour18awayfromwhat’sgoingoninclass,soyoumaymisssomething19.Thenexttimeyou20tosendamessageinclassyoushouldthinkagain.

1．A．strangeB．wrongC．greatD．old

2．A．AtfirstB．HoweverC．BesidesD．Inall

3．A．earlyB．freeC．happyD．certain

4．A．atschoolB．indangerC．ondutyD．inhospital

5．A．effortB．wayC．needD．change

6．A．learnB．fightC．helpD．play

7．A．unlessB．onceC．beforeD．though

8．A．allowedB．orderedC．sentD．invited

9．A．makesB．doubtsC．breaksD．follows

10．A．continueB．prepareC．failD．remember

11．A．boringB．excitingC．disturbingD．normal

12．A．reporterB．teacherC．doctorD．engineer

13．A．laughB．mindC．knowD．listen

14．A．savedB．heardC．acceptedD．connected

15．A．funnyB．easyC．difficultD．impossible

16．A．killB．hurtC．satisfyD．interest

17．A．actuallyB．partlyC．quicklyD．suddenly

18．A．breathB．feelingC．attentionD．courage

19．A．surprisingB．unbelievableC．importantD．terrible

20．A．regretB．promiseC．forgetD．plan

Earlierthisyearthephonecompaniesstoppedsupportingthesoftwareformyold3Gphone.Soliketherestofthemodernworld,Iwas21tobuyanewsmartphone.Ididn’tuseitmuchatfirst,onlytogeta22frommydaughterortoplayagameortwo.Soon,however,Ifounditfar23tosurftheweborcheckoute-mailsonthesmartphonethanmycomputer.Evenwithmylimitedtime,I24foundmyselfspendingmoreandmoreofitonthisphone.Ithappenedalmostwithoutme25it.

YesterdayIwasonit,26theseaofstories,posts,news,andvideos.Thensuddenlyalong,white,27nosepusheditswaybetweenmeandmy28.Istartedtopushitawaybutthatonlygotmealick(舔)frommychintomyglasses.29,Iputthephonedown,tookmyglassesoffand30mydog.Soonwewerehugging,runningaround,andplayingdownthehallwaysofmyhome.AndI31somethingtoo.Therewasafeelinginmyheart:a32mixtureoflove,laughter,andjoy.Itwasa(n)33thatIhadn’tgot-tenonceduringallthattimeIhadspentonmyphone.

Technologyisheretostay.Butweshouldn’tletit34us.Weshoulduseitonlywhenit35ustodotheimportantthingslikelovingeachother,beingclosertoourfamily,ormakingthisworldabetterplace.

21．A．annoyedB．removedC．forcedD．surprised

22．A．callB．punishmentC．scoreD．label

23．A．tougherB．easierC．dearerD．clearer

24．A．hardlyB．occasionallyC．sincerelyD．quickly

25．A．admittingB．removingC．realizingD．valuing

26．A．lookingthroughB．givingawayC．droppingoutD．makingup

27．A．bleedingB．injuredC．runningD．curious

28．A．computerB．smartphoneC．seatD．room

29．A．ShoutingB．SweepingC．SwingingD．Laughing

30．A．touchedB．droveC．complainedD．cleaned

31．A．forgotB．regrettedC．noticedD．appreciated

32．A．meaninglessB．wonderfulC．unfortunateD．complex

33．A．intentionB．topicC．styleD．feeling

34．A．controlB．benefitC．reachD．leave

35．A．preventsB．hatesC．helpsD．trains

Nowadays,onlinecoursehavebecomepopularinmanycountries.Therearedifferentkindsofonlinecourses,butmostshowa36ofateacherandstudentsinaclassroom.Studentswatchthevideoonlineandtakepartinonline37Somecoursedthataretaught38theInternetalive.Somecoursedarefreeandopentoanyone,givingstudentsanywherethe39tostudyatanytime.Ofcourse,watchingstudentsandteachersonacomputerscreenisnotthesameastakingpartina40class.

Otherkindsofe-learningarebeing41aroundtheworld.InSingapore,someschoolshavetabletsandtouchscreensinsteadofbooksandblackboardsintheclassrooms.Therearealsosocialmedia42tohelpthestudentsworktogetheronprojects,andonline“worlds”wherethestudentscan43witheachother.

InSouthKorea,somestudentsaretaughtEnglishbyteachersabroad.Theteachersareintheir44countriesandareconnectedtotheKoreanclassroomsthroughtheInternet.Insteadoflookingatascreen,thestudentsinteractwitha45intheclassroom.Therobotiscontrolledbytheteacherandcanmovearoundtheclassroom,talkingwithstudents.Itisunlikelythatrobotteacherswill46realteachers.Butlikeonlinelearningenvironments,theycanbeuseful47.

Theseimportantexamplesshowusthate-learningcanbe48Thankstotechnology,moreandmorewaysofteachingandlearningarebeingdeveloped.Nobodyknows49theclassroomofthefuturewilllooklike,butonethingisforsure—therehasneverbeena50interestingtimetobeastudent.

36．A．pictureB．videoC．noteD．passage

37．A．activitiesB．partiesC．meetingsD．gatherings

38．A．alongB．aboutC．throughD．across

39．A．excuseB．reasonC．choiceD．chance

40．A．realB．virtualC．advancedD．attractive

41．A．taughtB．testedC．revisedD．recorded

42．A．agenciesB．departmentsC．applicationsD．advertisements

43．A．tradeB．exchangeC．chatD．communicate

44．A．neighborB．formerC．foreignD．home

45．A．teacherB．robotC．computerD．radio

46．A．affectB．attackC．rewardD．replace

47．A．toolsB．toysC．productsD．structure

48．A．boringB．successfulC．doubtfulD．challenging

49．A．whenB．whichC．whatD．who

50．A．moreB．quiteC．veryD．just

Withadvancesinelectronicsandneuroscience,researchershavebeenabletoachieveremarkablethingswithbrainimplantdevices.Inadditiontorestoringphysicalsenses,scientistsarealsoseekinginnovativewaysto51communicationforthosewhohavelosttheabilitytospeak.Anew“decoder”receivingdatafromanelectronicdeviceimplantedinsidetheskull,forexample,mighthelpparalyzedpatientsspeakusingonlytheirminds.ResearchersfromtheUniversityofCaliforniadevelopedatwo-stagemethodtoturnbrain52intocomputer-synthesizedspeech.

Foryears,scientistshavebeentryingtocontrolanduseneutralinputstogiveavoicebacktopeoplewhoseneurologicaldamagepreventsthemfromtalking.Untilnow,manyofthesebrain-computerinterfaceshave53aletter-by-letterapproach,inwhichpatientsmovetheireyesorfacial54tospellouttheirthoughts.Butthesetypesofinterfacesareveryslow-mostmaxoutproducing10wordsperminute,afractionofhuman’saveragespeakingspeedof150wordsperminute.

Thebrainisundamagedinthesepatients,buttheneurons-thepathwaysthat55yourarms,oryourmouth,oryourlegsarebrokendown.Thesepeoplehavehighcognitivefunctioningandabilities,buttheycannotaccomplish56taskslikemovingaboutorsayinganything,“saysaco-leadauthorofthenewstudyandanassociateresearchspecializinginneurologicalsurgeryatUCSF.”Weareessentiallybypassingthepathwaythat’sbrokendown.“

Theresearchersstartedwithhigh-resolutionbrainactivitydatacollectedfromfivevolunteersoverseveralyears.Theseparticipants-allofwhomhadnormalspeechfunction-werealreadyundergoinga57processforepilepsy(癫痫)treatmentthatinvolvedimplantingelectrodes(电极)directlyintotheirbrains.Theresearchteamusedtheseelectrodesto58activityinspeech-relatedareasofthebrainasthepatientsreadoffhundredsofsentences.

Fromthere,theUCSFteamworkedoutatwo-stageprocesstorecreatethespokensentences.First,theycreatedadecoderto59therecordedactivitypatternsasinstructionsformovingpartsofavirtualvocaltract(声道).Theythendevelopedasynthesizerthatusedthe60movementstoproducelanguage.

Otherresearchhastriedtodecodewordsandsoundsdirectlyfromneuralsignals,61themiddlestepofdecodingmovement.However,astudytheUCSFresearcherspublishedlastyearsuggeststhatyourbrain’sspeechcenterfocusesonhowtomovethevocaltracttoproducesounds,62whattheresultingsoundswillbe.

Usingthismethod,theresearcherssuccessfullyreverse-engineeredwordsandsentencesfrombrainactivitythat63matchedtheaudiorecordingsofparticipants’speech.Whentheyaskedvolunteersonanonlinecrowd-sourcingplatformtoattemptto64thewordsandsentencesusingawordbank,manyofthemcouldunderstandthesimulated(模拟的)speech,thoughtheir65wasfarfromperfect.Outof101synthesizedsentences,about80percentwereperfectlytranscribed(记录)byatleastonelistenerusinga25-wordbank.

51．A．offerB．facilitateC．initiateD．influence

52．A．signsB．consciousnessC．signalsD．waves

53．A．featuredB．neglectedC．rejectedD．missed

54．A．expressionsB．musclesC．languagesD．masks

55．A．contributetoB．communicatewithC．matchwithD．leadto

56．A．dailyB．delicateC．repetitiveD．tough

57．A．growingB．producingC．checkingD．monitoring

58．A．trackB．mapC．organizeD．design

59．A．copyB．transformC．followD．interpret

60．A．physicalB．virtualC．individualD．external

61．A．consideringB．creatingC．skippingD．moving

62．A．otherthanB．asidefromC．regardlessofD．ratherthan

63．A．roughlyB．barelyC．similarlyD．formally

64．A．spellB．identifyC．parallelD．invent

65．A．versionB．fluencyC．pronunciationD．accuracy

Ihadreallygotamobilephone!Icouldn’tbelievemyeyeswhenIopenedtheboxatmy15thbirthdayparty.AssoonasIgottomy66thenextmorning,Ishowedoffmyphoneandaskedeveryonefortheir67.Icouldn’tpaymuchattentiontotheteachersbecauseIwastoobusyonmy68.Aweeklater,wetookatestandIfailed.Tomakematters69,mymomhadto70thepaper.Itwashardtoshowmymomthe71.ShewasusedtoseeingA’sandB’sonmypapers.Well,finally,Ishowedherandshecouldn’t72it.Shewasangryanddisappointed.

Weekspassedandmyparentsstartedto73thefactthatthephonehadanegativeimpactonmylifeandstudies.Theysaid,“Wehavenoticedthatyouneverpayattentiontous.It’slikeyouhaveyourownlittle74now.”Iactedliketheywerewrong,butthenIstartedtowonderifitwastruethatIwasspendingtoomuch75onthephone.Aweeklater,Itried76awholedaywithoutaphoneanditdidn’tgothatbadly.Ihadsomuch77becauseIwasactuallyspendingtimewithmyfamily.Fromthatday,Ihada(n)78pointofviewtowardsmobilephones.Phonesreallytakeyouawayfromtherestoftheworld.I’mnotsayingthatphonesare79andnottousethem,butyoudohavetospare(抽出)sometimetospendwithyourfamilyandnotget80withyourphoneallday.Myphonetookawaymytimefrommyfamily.Italsoinfluencedmygrades.Iwillkeepusingmyphone,butIwillhaveitunderbettercontrol.

66．A．officeB．schoolC．storeD．home

67．A．numbersB．namesC．helpD．addresses

68．A．jobB．testC．phoneD．desk

69．A．clearerB．easierC．worseD．better

70．A．readB．signC．doD．make

71．A．boxB．bookC．homeworkD．paper

72．A．believeB．supportC．seeD．achieve

73．A．doubtB．knowC．acceptD．enjoy

74．A．secretB．ideaC．worldD．dream

75．A．timeB．forceC．moneyD．control

76．A．studyingB．workingC．spendingD．thinking

77．A．troubleB．worryC．funD．improvement

78．A．differentB．goodC．strangeD．interesting

79．A．expensiveB．badC．necessaryD．useful

80．A．patientB．pleasedC．honestD．Stuck

BringingMosquitoesUnderControl

Everyyear,hundredsofthousandsofpeopledieofmosquito-bornediseaseslikemalariaanddenguefever.Drugtreatmentsare81,and,despitedecadesofeffort,vaccineshave,formanyofthesediseases,proventobedifficulttodevelop.

Itisbetter,then,tostoptheseinfectionshappeninginthefirstplaceby82doingawaywiththemosquitoesthatcarrythediseases.CRISPR-Cas9,anewandpowerfulgenetic-engineeringprocess,couldhelptodojustthat.

CraigMontell,oftheUniversityofCalifornia,andhiscolleagueshaveusedCRISPRto83anexistingcontrolmethodcalledthesterileinsecttechnique(SIT),whichinvolvesreleasinglotsofsterilized(绝育的)malesintothewild.Femalesthatmatewiththesemalesproducenoyoung.84releasescanreducepopulationsdramatically.SIThasbeenusedinNorthAmericatoeliminatescrewwormflies,anagriculturalpest.

SIThasbeentriedonmosquitoes,too,butwithless85.Onereasonseemstobetheside-effectsoftheprocedure.Tosterilizethem,malesareexposedtopoisonouschemicals.Thisworks,butitdamagestheminotherways,too.Theresultcanbesicklyindividualsthat86tocompeteinthematinggamewithwildmosquitoes.

MontellandhiscolleagueshopedthatCRISPRmightoffera(n)87.Theirfirststepwastolookforgeneswhichaffectfertility(可繁殖性)inmosquitoes.Theybegantheirhuntinfruitfliesandendedupfocusingonagenethat,when88,mademalefruitfliessterile.Thegenewaspresentinasimilarformintheirtargetmosquitospecies,Aedesaegypti,whichpasseson,amongotherillnesses,yellowfever,dengueandtheZikavirus.Disablingthe89geneinmaleAedeslikewiselefttheminfertile.90,thegeneticchangesinvolveddidnotappeartoaffecttheengineeredmosquitoesinanyotherway.Oneverymeasureof91,theyperformedaswellaswildmosquitoes.

92thedetailsarenotfullyunderstood,oncefemalemosquitoeshavematedafewtimes,theybecomeunwillingtodosoagain.Matingwithaninfertilemaleis,therefore,notonlyfruitlessinitself,butshouldalsoleaveafemalelessinterestedin93males.

Thereismoreworktobedonebeforefieldtrials,buthavingestablishedthe94,Montellisexcitedtoseewheretheworkmightlead.Thattheengineeredmalesleavenoyoungmeansthattherearefewerworriessurroundingany95consequenceswhichmightarisefromthereleaseofmillionsofgeneticallyeditedcreaturesintotheenvironment.AndthatthetargetgeneisfoundinbothfruitfliesandAedessuggestsitislikelytoexistinotherdisease-carryingmosquitoes,too.

81．A．availableB．imperfectC．necessaryD．painful

82．A．completelyB．instantlyC．simplyD．suddenly

83．A．enhanceB．establishC．identifyD．test

84．A．DelayedB．LimitedC．PlannedD．Repeated

85．A．complexityB．frequencyC．riskD．success

86．A．chooseB．continueC．learnD．struggle

87．A．alternativeB．combinationC．explanationD．guarantee

88．A．insertedB．removedC．signaledD．updated

89．A．abnormalB．alteredC．equivalentD．original

90．A．CruciallyB．EvidentlyC．InevitablyD．Shockingly

91．A．healthinessB．maturenessC．productivityD．safety

92．A．AlthoughB．AsifC．BecauseD．Ifonly

93．A．uncivilizedB．unengineeredC．unpreparedD．unrecovered

94．A．environmentB．principleC．ruleD．standard

95．A．directB．lastingC．socialD．unintended

Mymotherusedtoworkseveraljobsjusttomakeendsmeet,sofinanciallywebecameabletoaffordgroceries(食品杂货)fortheweek.

Thefollowingspringanew96movedintoourneighborhood.Thewife,Melissa,97befriendedmymom,andthechildrenbecamemypalssoon.I98wenttotheirhousetoplayafterschool.Oneafternoon,Iwasattheirhouse.Theirdaughter,tenatthetime,99aglassofmilkwithherfood.Melissastated,“Wehavenomoneyformilkthisweek.”Sheexplainedwitha(n)100look,“Moneyisreallytight.”

Later,Icamehomeandtoldmymomaboutthe101Melissawasexperiencing.Sheimmediatelyopenedthecupboarddoorsand102pullingoutfood.Wefoundasizableboxand103itfull.Thenwedrovetoourfriends’house.

Theywere104byourvisit.MelissathengraspedMominatightembraceandstartedto105.Tearsbegantorolldownmymother’sfaceasshe106herfriend,understandinghowharditcouldbeto107toprovideforherfamily.

Lookingatmymother,Ifelt108tobeherdaughter!Shehadworkedsohardtopayforthegroceries,butshedidn’t109togivetothoseinneed.Becauseofher,wewereabletosharethisamazing110.Whatagreatexampleshesetformethatday!

96．A．groupB．familyC．residentD．neighbor

97．A．eventuallyB．naturallyC．obviouslyD．quickly

98．A．usuallyB．secretlyC．actuallyD．accidentally

99．A．threwB．requestedC．brokeD．supplied

100．A．upsetB．angryC．curiousD．interested

101．A．frustrationB．failureC．hardshipD．emotion

102．A．admittedB．consideredC．suggestedD．started

103．A．packedB．soldC．broughtD．took

104．A．concernedB．surprisedC．encouragedD．confused

105．A．talkB．sweatC．cryD．wave

106．A．staredatB．heldontoC．cameacrossD．stoodby

107．A．struggleB．planC．chooseD．agree

108．A．happyB．contentC．proudD．lucky

109．A．hesitateB．prepareC．careD．pretend

110．A．targetB．guidelineC．activityD．experience

Howwouldyoufeelifmovingtoanewtownmeantlosing111ofyourfriendsWhatiftheonlywayofgettingnewsfrom112friendswaswritinglettersthattookagestobe113Thiswashowthingsworkednotverylongago.114advancesintechnology,howwemakefriendsandcommunicatewiththemhaschanged115.

Nowadays,wecanmovearoundtheworldand116stayintouchwiththepeoplethatwewanttoremainfriendswith.Socialmediatoolsletusseewhatourfriendsareuptoand117friendships.Allyouneedisawi-ficonnection.

Thedigitalagealsoenablesustofindpeoplewho118ourinterests,suchascollectingmodelcarsorplayinganunusualinstrument.Whateverour119,theInternetcanconnectuswithotherswhoalsoenjoydoingthem,120theyliveontheothersideoftheworld.

Butwhenyou“121”peopleonline,doesthismeanthattheyreallyareyourfriendsItdepends.

Ifpeoplealways122truepersonalinformationonline,thenyes,thesefriendshipscanbe123andmeaningful.Butweneedto124thatwhatweseeonsocialmediaisoftennotthewholetruthaboutaperson.

Onsocialmediasites,peopletendto125onlypositiveupdatesthatmakethemappearhappyandfriendly.But126photoscanhiderealproblems.Rememberthesaying:ontheInternet,127knowsyouareadog.Ayoungpersoncould,beold;awomancouldbeaman;wecouldevenbesharingourinformationwithcriminals.

Butthisdoesn’t128thatweshouldthrowthebabyoutwiththebathwater.Althoughtechnologyhaschangedthewayweacquirefriends,themeaningoffriendshipandourlongingforfriendsremainthe129.AsAristotlesaid,noonewouldchoosetolive130friends,evenifhehadallothergoods.

111．A．trustB．trackC．supportD．control

112．A．farawayB．newC．strangeD．indifferent

113．A．deliveredB．readC．noticedD．mentioned

114．A．InsteadofB．RegardlessofC．ThankstoD．Accordingto

115．A．slightlyB．generallyC．deliberatelyD．significantly

116．A．evenB．everC．stillD．almost

117．A．seekB．maintainC．exploreD．attain

118．A．stirB．shareC．drawD．pursue

119．A．hobbiesB．habitsC．strengthsD．advantages

120．A．asifB．aslongasC．evenifD．apartfrom

121．A．knowB．meetC．friendD．chat

122．A．exposeB．knowC．classifyD．exchange

123．A．falseB．holyC．pureD．real

124．A．keepinmindB．keepintouchC．keepincheckD．keepinshape

125．A．conveyB．poseC．postD．click

126．A．smilingB．postedC．clearD．shared

127．A．anybodyB．nobodyC．everybodyD．somebody

128．A．suggestB．matterC．realizeD．mean

129．A．oppositeB．sameC．similarD．unchanged

130．A．withB．onC．forD．without

Lastsummer,wewenttoHawaiiforholiday.Duringmy131tripwithmyhusband,wespentmostofourtimetravellingduringtheday132thesea,andthenenjoyingwalksalongthebeachintheevenings.

Wedidn‘ttakeany133becausewehadenough.Wehadvisitedtheislandmanytimesbefore.Onourwaytothe134wejokedthatotherthanoursunburntskin,wehadnowaytoshowthatwehad135there!

Aswestoodinlineatthecheck-in,wenoticedthe136whohadbeenonourplanetheweekbefore.Ontheplane,wesatdirectlybehindthem:amotherandherfourchildrenwithoutDad’s137.Welearnedthatthefatherhadbeenkilledinajet-skiingaccidentthatweek,andhiswifeandchildrenhadto138maketheirwayhomewithouthim.

Wewatchedthechildrenbecome139whiletheywereplayingcards.Butthemotherstaredatherknees,140tobelieveherhusband’sdeath.Wecouldalmostfeelherpainaswerealizedthatthiscouldhavehappenedtoanyofus.141wewerelaughingandplayinginthewater,thispoorfamilyhadbeen142thesufferings.Thevacationtheyhaddreamedabouthad143theterribledreamtheywouldneverforget.

Isuddenlyregrettedthatwehadnopicturesforthisvacationtogether.Iclosedmyeyes,144thatmymindhadrecordedallthewonderfulmomentsthatIhad145withmyhusbandthatweek.Whatatrip!

131．A．week-longB．month-longC．year-longD．weekend

132．A．byB．inC．forD．with

133．A．actionB．childrenC．photosD．friends

134．A．seaB．airportC．destinationD．station

135．A．traveledB．leftC．missedD．forgotten

136．A．classB．parentC．passengerD．family

137．A．attendanceB．careC．protectionD．love

138．A．nervouslyB．bravelyC．confidentlyD．proudly

139．A．unworriedB．sadC．worriedD．frightened

140．A．unableB．likelyC．willingD．afraid

141．A．WhetherB．WhileC．AlthoughD．If

142．A．feelingB．experiencingC．fightingD．ignoring

143．A．wipedoutB．easedoffC．brokenupD．turnedinto

144．A．noticingB．hopingC．findingD．seeing

145．A．createdB．valuedC．sharedD．planned

Ihavealwaysbeenanoptimist.Isupposeit'srootedinmybeliefthatthepowerofcreativityandintelligencecanmaketheworlda146place.

Ihavelovedlearningnewthingsand147problems.Therefore,whenIsatdownata148forthefirsttimeintheseventhgrade,Iwashookedandit149mylife.After30years,I'mstillinspiredbycomputers.Ibelievethecomputerisoneofthemost150toolswecanusetofeedourcuriosityandsolveproblemsthateventhe151peoplecouldn'tsolveontheirown.

Computershave152howwelearn,givingusawindowintoalloftheworld'sknowledge.Theyarehelpingusstayclosetothepeoplewhoare153tous,wherevertheyare.

IfeelparticularlyluckytodosomethingeverydaythatI154doing.I'mespeciallypleasedwhenweshowpeoplesomething155,likeacomputerthatcanrecognizeyourhandwritingoryourspeech.

However,therearemanyotherwaysinwhichwecanputour156toworkwithaPCtoimproveourworld.Everyyear,millionsofpeople157fromdiseasesthatareeasytopreventortreatinthedevelopedworld.Ibelieveitaresponsibilityto158theworld.Mywife,Melinda,andIhavecommittedtoimprovinghealthandeducationinawaythatcan159asmanypeopleaspossible.

I'mstillan160,believingthatprogressoneventheworld'stoughestproblemsispossible—andit's161everyday.Weareseeingnewdrugsfordeadlydiseases,newdiagnostic（诊断的）tools,andnewattentionpaidtothe162problemsinthedevelopingworld.

I'mexcitedbythe163Iseeformedicine,educationandtechnology.Ibelievethatthroughourintelligenceandwillingnessto164toughproblems,wearegoingtomakesomeamazingachievementsinallthese165inmylifetime.

146．A．betterB．cleanerC．quieterD．broader

147．A．bringingupB．workingoutC．breakingupD．pickingout

148．A．lossB．tableC．distanceD．computer

149．A．testedB．provedC．changedD．witnessed

150．A．difficultB．commonC．inexpensiveD．unbelievable

151．A．bravestB．oldestC．smartestD．strongest

152．A．checkedB．comparedC．transformedD．challenged

153．A．friendlyB．rudeC．generousD．important

154．A．riskB．enjoyC．hateD．avoid

155．A．newB．memorableC．impossibleD．precious

156．A．possessionB．creativityC．abilityD．expectation

157．A．dieB．quitC．learnD．recover

158．A．givebacktoB．putanendtoC．lookforwardtoD．showhonorto

159．A．cureB．supportC．informD．relieve

160．A．expertB．audienceC．optimistD．educator

161．A．lastingB．damagingC．happeningD．disappearing

162．A．wealthB．populationC．familyD．health

163．A．issuesB．differencesC．collectionsD．possibilities

164．A．studyB．solveC．ignoreD．create

165．A．areasB．factorsC．organizationsD．occasions

Changinglandintofarmsorpastures(牧场)removesforestsandworsensclimatechange.Andclimatechangeis166farmsthatalreadyexist.Thus,wehavetotakemeasurestogrowmorecropsto167agrowingglobalpopulation.

Agreenhouseisabuildingalmostentirely168glassorplastic.Thisprotectstheplantsinsidefromanimalsandextreme169whilegivingthemasmuchlightandheataspossible.Butnowthereisanew170togrowingcrops.Scientistshavediscoveredthatplantsgrowbestunderacertaintypeof171,whichcanbeprovidedbyredandblueLEDs.Thecombinationoftheselightsattherightlevelmakesaspacelookpink.Since“pinkhouses”supplytheirownlight,theydon’t172tohaveglasswallsandceilings(顶棚),andtheycanbesetupanywhere.Pinkhousesarevertical(垂直地)farms,whichdon’toccupyalotof173.Farmer