②寒假预习-第02讲 选择必修第三册 Unit 2 Out of this world(学生版)2025年高二英语寒假衔接讲练

第02讲选择必修第三册Unit2Outofthisworld目录新知导航：熟悉课程内容、掌握知识脉络基础知识：知识点全面梳理，掌握必备重点记忆：关键点快速记忆，提升能力小试牛刀：考点剖析+过关检测，合理应用核心单词讲解1.absencen.缺乏，不存在；缺席(1)absencefrom缺席……in/duringone’sabsence 当某人不在时(2)absent adj.缺席的，不在的beabsentfrom 缺席，不在2.bothervt.使烦恼，使担心；花费时间精力(做某事)；打扰vi.花费时间精力(做某事)n.麻烦，困难bothertodosth./bother(about)doingsth.QUOTE费力做某事(常用于否定或疑问句)Itbotherssb.that... 令某人烦恼的是……Don’tbother 不必麻烦Sorrytobotheryou 对不起，打扰了3.occupyvt.占用，使用；居住；占领，侵占；使忙于(1)occupyoneselfwith/(in)doingsth.忙于(做)某事beoccupiedwith/(in)doingsth.忙于(做)某事(2)occupation n.占用，使用；居住；占领，侵占；职业4.castnewlighton使进一步了解……casta/an...look/glanceat 向……投去……的目光castaneyeover 瞥一眼，粗略看一下castdoubton 对某事产生疑虑castashadowon 在……上投下阴影5.maintenancen.维护，保养；维持，保持maintain vt.维护，保养；维持；供养maintainstability/continuity保持稳定/连续性maintaincontact/relations/links保持联系maintainthat 主张，坚持认为6.circumstancen.条件，状况；境况，(尤指)经济状况inthecircumstances 在这种情况下，既然如此in/under...circumstances 在……条件/情况下in/undernocircumstances决不，无论如何都不(置于句首时，句子要用部分倒装形式。)7.exposuren.面临，遭受；揭露；报道(1)exposureto 接触……；暴露于……(2)expose vt.使暴露，使显露；揭露；曝光expose...to... 使……接触到……；使……暴露于……(exposeoneselfto 使自己暴露于……)(3)exposed adj.暴露的，无遮蔽的beexposedto 暴露于；接触8.inviewof鉴于，考虑到(1)inone’sview/fromone’spointofview在某人看来inview 在视野范围内comeintoview 进入视野(2)view...as... 把……看作/当作9.vitaladj.必不可少的，对……极重要的；维持生命所必需的bevitalfor/to 对……至关重要It’svitaltodosth. 做某事非常重要bevitalthatsb.(should)dosth.某人做某事是非常重要的(vital后跟句子时，从句中的谓语动词用“should+动词原形”表示虚拟，其中should可以省略。)10.disciplinevt.严格要求(自己)；惩罚；训练n.训练，纪律；行为准则；自制力disciplineoneself(todosth.)严格要求自己(做某事)disciplinesb.forsth. 因某事惩罚某人11.crucialadj.至关重要的，关键性的becrucialto/forsb./sth.对某人/某物来说至关重要becrucialtodoingsth. 做某事是至关重要的It’scrucialtodosth. 做某事是至关重要的It’scrucialthatsb.(should)dosth.某人做某事是至关重要的(从句中的谓语动词用“should+动词原形”表示虚拟，其中should可以省略。)12.comprisevt.包括，包含；组成，构成becomprisedof由……组成延伸：不一样的“组成”bemadeupofconsistofbecomposedof13.foundationn.基础，根据；地基；创办；基金会(1)laythefoundationfor 为……打下基础shake/rockthefoundationsofsth. 动摇……的根基/基础withoutfoundation 没有根据(2)found vt.创办，成立14.originn.起源，起因；出身(1)inorigin在本源上(2)originate vi.&vt.起源；创始originatefrom/in 来自，源于(后接地点、时间或事件)(3)original adj.起初的；新颖的(4)originally adv.起初，原来15.calculatevt.计算，核算；预测，推测(1)calculatethat/wh-clause计算……；预测……calculateon/upon 指望；期待becalculatedtodosth. 计划做/打算做/旨在做某事Itiscalculatedthat... 据估算……(2)calculation n.[C，U]计算；预测calculator n.计算器16.assistantn.助理；售货员；助教adj.助理的；副的(1)anassistantto...……的助手teachingassistant/assistantteacher助教shopassistant 店员(2)assist v.帮助；协助assist(sb.)withsth./in(doing)sth.帮助(某人)(做)某事；在(做)某事上协助(某人)assistsb.todosth. 帮助某人做某事(3)assistance n.援助；帮助cometoone’sassistance 来帮助某人17.sheltern.居所，住处，庇护vt.保护，掩蔽vi.躲避(1)take/seekshelterfrom...躲避……undertheshelterof...在……的庇护下givesb.shelter 庇护某人(2)shelter...from... 保护/庇护……免受……18.coveragen.新闻报道；覆盖范围；信息范围coverv.覆盖；涉及；报道；足够支付；走过n.盖子；封面becoveredby/with被……覆盖二、重点词块速记1.attachoneselfto依恋，附属于

2.carryout 做，实施，执行，开展

3.castnewlighton 使进一步了解……

4.in/underthecircumstances

在这种情况下，既然如此5.inviewof 鉴于，考虑到

6.puton 穿上；增加(体重)；举办，展出；打开(设备、装置等)；提高……的成本(或价值)；(行为举止)假装

7.breathein 吸气；吸入

8.headout 出发；头探出；启程

9.goby 流逝，过去10.setup 建立11.cometoanend 结束12.differfrom 与……不同13.dueto 由于，因为14.leadto 导致15.laythefoundationfor为……打下基础16.makesenseof理解

17.gofarbeyond 远超出

18.bebathedin 沐浴

19.apply...to... 把……应用到……20.setup 建立

21.longtodosth. 渴望做某事

22.awasteof 浪费23.makemajorcontributionsto 做出重要的贡献24.takeadvantageof 利用三、重点句型剖析1.Ourmainmissionistoconductscientificresearch.(不定式作表语)我们的主要任务是进行科学研究。2.SplendidastheviewoftheEarthis,spacewalkingisnotasexcitingasyoumightthink.(as引导让步状语从句)虽然地球的景色十分壮观,但太空行走并不像你们可能想象的那么激动人心。3.That’swhyeveryspacewalkiscarefullyplanned.(That’swhy...)那就是为什么每次太空行走都是精心计划的。4.Spendingsometimeinthegymisofvitalimportancetoastronauts’health.(be+of+抽象名词)花些时间在健身房锻炼对宇航员的健康至关重要。5.Duetothenearabsenceofgravityinspace,wehavetoattachourselvessothatwedon’tfloataround.(sothat引导目的状语从句)由于在太空中几乎没有重力,我们必须绑着自己,这样我们才不会四处飘浮。6.Intheearly1600s,Galileowasthefirsttousehistelescopetoexploretheskyandsincethen,telescopeshavecontinuallyimproved.

(thefirsttodo…)在17世纪早期,伽利略是第一个用望远镜探索天空的人,从那以后,望远镜不断改进。7.Whetherlifeonotherplanetsdoesexistisyettobeproved,butthesignsarepromising:KeplerhasdetectedmanysuitableplanetsthatarealmostthesamesizeastheEarth.(对谓语动词的强调)其他行星上是否存在生命还有待证实,但迹象很有希望:开普勒已经发现了许多合适的行星,它们的大小几乎和地球一样。

8.ItisthroughourresearchintospacethatwehaveconfirmedthattheEarthisroundandthatitorbitstheSun.(强调句型)正是通过我们对太空的研究,我们证实了地球是圆的,它绕着太阳转。9.Withtechnologiesfirstresearchedanddevelopedforspaceexploration,wecansolvesomeofthebigproblemsfacingmankind,makingourlivessaferandeasier.(现在分词短语作结果状语)通过在太空探索中首次研究和发展的技术,我们可以解决人类面临的一些重大问题,使我们的生活更安全、更轻松。10.Forexample,liquidhydrogenisacleanalternativeenergysourcethatisusedwidelyasrocketfuel,anditislikelythathydrogenfuelcellvehicleswillbemass-producedandlaunchedinthenearfuture.(Itislikelythat...)例如,液氢是一种清洁的替代能源,被广泛用作火箭燃料,氢燃料电池汽车很可能在不久的将来被大量生产并投放市场。11.Ithasbeencalculatedthattheglobalspaceeconomyisincreasingbybillionsofdollarseveryyear.(Ithas+v.-ed+that...)据统计,全球航天经济每年增长数十亿美元。重点句型1.sothat引导目的状语从句(教材原句)Duetothenearabsenceofgravityinspace,wehavetoattachourselvessothatwedon’tfloataround.

在太空中由于几乎没有重力,我们必须绑着自己,这样我们才不会四处飘浮。归纳：sothat意为“为了,以便”,引导目的状语从句,相当于inorderthat。延伸：不一样的“sothat”(1)sothat除了引导目的状语从句外,还可引导结果状语从句,意为“结果是,所以”。(2)sothat引导目的状语从句和结果状语从句的区别:①从意义上讲,sothat引导目的状语从句,意为“为了,以便”;引导结果状语从句,意为“结果是,所以”。②从形式上看,sothat引导的目的状语从句中常有情态动词may,can,might或could;sothat引导的结果状语从句一般要用逗号和主句隔开,从句里没有表目的的情态动词may,can,might或could,此时that可以省略。2.as引导让步状语从句(教材原句)SplendidastheviewoftheEarthis,spacewalkingisnotasexcitingasyoumightthink.

虽然地球的景色十分壮观,但太空行走并不像你们可能想象的那么激动人心。归纳：as意为“虽然,尽管”,引导让步状语从句,句子为部分倒装形式,其结构为:形容词/副词/动词原形+as+主语+谓语。(1)as引导让步状语从句时,可用though替代,但不能用although。(2)在上述结构中,若位于句首的是单数可数名词,则通常省略不定冠词a(n)。延伸：部分倒装还用于以下几种情况:(1)含有否定意义或否定形式的词或词组位于句首时。常见的词和短语有:never,seldom,rarely,little,barely,scarcely,hardly,nosooner,notuntil,atnotime,bynomeans,innocase,in/undernocircumstances,innosense,innoway,onnoaccount等。(2)“only+副词/介词短语/状语从句”置于句首时。(3)so/neither/nor表示前面所说的情况也适合于后者时,用“so/neither/nor+助动词/be动词/情态动词+主语”这样的倒装句式。(4)在“so...that”结构中,将“so+adj./adv.”置于句首时。(5)当虚拟条件句含有were,should,had时,可省略if,将were,should,had置于句首。3.be+of+抽象名词(教材原句)Spendingsometimeinthegymisofvitalimportancetoastronauts’health.花些时间在健身房锻炼对宇航员的健康至关重要。

归纳：“be+of+抽象名词”结构说明句子主语所具有的作用、重要性或意义。用于该结构中常见的抽象名词有:importance,value,help,use,benefit,interest,significance等。在这类抽象名词前我们可用一些形容词(词组),如great,little,some,any,no,notmuch等来修饰抽象名词,用以说明程度。延伸：“be+of+名词”结构“be+of+名词”结构还可用来说明句子主语在度量、大小、颜色、类别等方面的特征。这类名词有:colour,age,size,height,weight,shape,type,kind,quality等。在这类名词前常用different,all,thesame,this,that等词来修饰或说明。4.That’swhy…(教材原句)That’swhyeveryspacewalkiscarefullyplanned.

那就是为什么每次太空行走都是精心计划的。“That’swhy...”意为“那就是为什么……”,why引导表语从句。“That’sbecause...”意为“那是因为……”,说明的是原因。5.不定式作后置定语(教材原句)Intheearly1600s,Galileowasthefirsttousehistelescopetoexploretheskyandsincethen,telescopeshavecontinuallyimproved.

在17世纪早期,伽利略是第一个用望远镜探索天空的人,从那以后,望远镜不断改进。归纳：不定式作后置定语(1)英语中序数词是中心词或作定语修饰名词时,后常用不定式作后置定语。(2)除了序数词外,最高级或no,all,any等限定词的中心词也常用动词不定式作后置定语。(3)chance,wish,ability,courage,need,promise,attempt,time,opportunity,way等名词后常用不定式作后置定语。6.强调谓语动词(教材原句)Whetherlifeonotherplanetsdoesexistisyettobeproved,butthesignsarepromising:KeplerhasdetectedmanysuitableplanetsthatarealmostthesamesizeastheEarth.其他行星上是否存在生命还有待证实,但迹象很有希望:开普勒已经发现了许多合适的行星,它们的大小几乎和地球一样。

归纳：如何强调谓语动词英语中若对谓语动词进行强调,不能用强调句型,而用“do/does/did+动词原形”的形式,这种强调形式只有一般现在时和一般过去时,且只对肯定的谓语动词进行强调。7.itislikelythat...(教材原句)Forexample,liquidhydrogenisacleanalternativeenergysourcethatisusedwidelyasrocketfuel,anditislikelythathydrogenfuelcellvehicleswillbemass-producedandlaunchedinthenearfuture.

例如,液氢是一种清洁的替代能源,被广泛用作火箭燃料,氢燃料电池汽车很可能在不久的将来被大量生产并投放市场。itislikelythat...意为“很可能……”,其中it是形式主语,that从句作真正的主语。特别提醒：It’slikelythatsb.willdosth.可转换成sb./sth.islikelytodosth.重点语法(主语从句)一.概念：在句子中起名词作用的各种从句统称为名词性从句。根据它们在句中的语法作用,这类从句又可分为主语从句、宾语从句、表语从句和同位语从句。所以充当主语的从句叫主语从句。二、主语从句引导词连接词that,whether连接代词what,who,whom,which,whose,whatever,whoever,whomever,whichever连接副词when,where,how,why,whenever,wherever三、that引导的主语从句1.that引导主语从句时只起连接作用,在句子中不作任何成分,也无任何意义。Thatthefirecrackerslituptheskymadethechildrenjoyful.烟花照亮了天空,孩子们兴奋不已。2.有时为了平衡句子结构,用it充当形式主语,而将that从句置于后面。It’sobviousthathedidwellinthefinalexambecausetherewasanexcitedexpressiononhisface.很明显,他期末考试考得很好,因为他脸上带着兴奋的表情。特别提醒：that引导主语从句时通常不能省略,尤其是位于句首时。3.主语从句中常用it作形式主语的句型有:(1)It+be+形容词(clear,obvious,true,possible,certain,important,necessary,strange,natural,likely,surprising,vital等)+that从句(2)It+be+名词(词组)(apity,ashame,anhonour,afact,nowonder,nosurprise等)+that从句(3)It+be+过去分词(said,reported,announced,proved,thought,expected,hoped,decided,suggested,advised,ordered,required,demanded等)+that从句特别提醒：在上述it充当形式主语的句型中,若形容词是important,necessary,strange,natural,vital,essential等,过去分词中的动词是表“建议、命令、要求、请求”的动词,如suggest,advise,recommend,propose,order,command,require,request,urge,demand等,那么that从句中的谓语动词要用“should+动词原形”表示虚拟语气,其中should可以省略。*(读后续写之人物描写)ItisstrangethatTom(should)holdhisbreathfornearlyaminuteunderthewater.真奇怪,汤姆竟然能在水下屏住呼吸将近一分钟。Itisrequiredthatstudents(should)wearschooluniformsatschoolfromMondaytoFriday.学生被要求周一到周五在校穿校服。(4)It+不及物动词(短语)(happened,occurred,seemed,appeared,turnedout等)+that从句ItoccurredtomethatIhadleftthedoorunlocked.我突然想起我忘记锁门了。四、whether引导的主语从句whether意为“是否”,引导主语从句时只起连接作用,在句子中不作任何成分。Whetherweshouldgoonwiththeworkisstillaquestion.我们是否应该继续这项工作还是个问题。Itmakesnodifferencewhetherhewillcomeheretomorrow.明天他是否来这里无关紧要。特别提醒：whether引导主语从句(1)whether引导主语从句时可以放在句首,也可以让it充当形式主语,真正的主语后置。(2)whether引导主语从句时一般不能用if替代。五、连接代词引导的主语从句连接代词包括:what,who,which,whom,whose,whatever,whoever,whomever,whichever等,在句中作主语、宾语、表语或定语。WhatIsuggesttoyouisthatyoushouldimproveyourstudyefficiency.我给你的建议是你应该提高学习效率。Whowillcarryouttheimportantmissionhasn’tbeendecided.谁来执行这项重要任务还没有决定。特别提醒：连接代词引导主语从句what引导主语从句时在从句中作主语、宾语、表语或定语,相当于定语从句中的“先行词+关系代词”的形式,表示“……的事情(时间、地点、样子等)”。Wemadeatriptowhat(=theplacethat)wasonceaimperialpalace.我们到曾经是个皇宫的地方去旅游。Whoever(=Anyonewho)didthejobmustberewarded.无论谁做了这项工作一定要得到酬谢。六、连接副词引导的主语从句连接副词包括:when,where,how,why,whenever,wherever等,在主语从句中作状语。WhenwewillmakeatriptoKunmingwillbetoldsoon.我们什么时候去昆明旅游很快就会被告知。Whereverhe’llgoforhisjourneymakesnodifferencetome.他无论去哪儿旅行对我来说都无所谓。特别提醒：“疑问词+ever”既能引导主语从句,又能引导让步状语从句。但是“nomatter+疑问词”只能引导让步状语从句。Wheneveryouwanttocomeisfinewithus.(主语从句)无论你什么时候想来,我们都欢迎。Wheneveryougetintotrouble,youcanturntomeforhelp.(状语从句)无论什么时候遇到麻烦,你都可以向我求助。考点一、核心单词语法填空Ⅰ单词拼写1.Don’t________(使担心)yourselfaboutme;Iamdoingquitewell.2.Theythinkittakesnomorethanthreedaystofulfillthe________(任务).3.Manistheonly________(生物)thatisgiftedwithspeech.4.Ourresearchattemptsto________(评估)theeffectivenessofdifferentdrugs.5.________(此外),theyclaimthatanysuchinterferenceiscompletelyineffective.6.AllthisextraworkI’mdoingisbreakingintomy________(闲暇)time.7.Thequestionoftheoriginofthe________(宇宙)isstillhotlydebatedbyscientists.8.Reformisthepowerful________(原因)forcethaturgessocialadvancement.9.You’llneedto________(计算)howmuchtimetheassignmentwilltake.10.Theytookcareoftheyounggirl,providingherwithfoodand________(住所).Ⅱ单句语法填空1.(2023上·福建漳州·高二统考期中)Afteralong(absent)fromwork,Iwentbacktothecompany.2.(2023上·高二课时练习)Hedidn’tbother

(answer)myquestion,whichdidn’tappealtohim.3.(2023上·江苏无锡·高二江阴市华士高级中学校考阶段练习)(occupy)myselfinwatchingthevase,Ihadnotimetoappreciateotherantiquesinthisshop.4.(2023上·广东惠州·高二校考期中)Peopleneedtoberetrainedtobequalifiedforthenew(occupy).5.(2023上·高一课时练习)Shekeepsherselffully(occupy)withvolunteeractivities.6.(2023上·福建漳州·高二福建省华安县第一中学校考阶段练习)Threeprofessorswereaskedtomakean(evaluate)oftheteachingplan.7.(2023上·海南三亚·高一校考期中)Thetwocountrieshavealways(maintain)closerelationsforyears.8.(2022下·高二课前预习)Theoperatorhastobeabletocarryoutroutine(maintain)ofthemachine.9.(2023上·海南·高二海南中学校考期中)Underno(circumstance)shouldteachersbeservantsofstudents.10.(2022下·高二课前预习)Heshouldn’tbetoblamefortheincidentthiscircumstance.11.(2023上·河北石家庄·高二校考阶段练习)(expose)toloudmusictoomuchhascausedhearingprobleminsometeenagers.12.(2023上·广东广州·高二执信中学校考阶段练习)Duetothelongterm(expose)toradiation,shedevelopedbloodcancer.13.(2023上·四川遂宁·高一射洪中学校考期中)Moststarsare(visible)tothenakedeye.That’swhywecan’tseemanyevenonaclearday.14.(2023上·高二课时练习)Asisknowntoall,interestisvitalthesuccessofone’scareer.15.(2023·高二课时练习)Heisburstingwith(vital)andnewideas.16.(2023上·高一课时练习)Our(origin)planwastogocamping,butlateritbegantorainheavily.17.(2023下·高二单元测试)Hisfather(frequent)amusedtheboywithatabletcomputerwhichwasloadedwithcolorfulpicturesthatcomealivewhenyoupokethem.18.(2022·全国·高三山东省东明县第一中学校考专题练习)Theflooddisastershavethehighestinthisarea,inotherwords,theyoccur.(frequent)19.(2022下·高二课前预习)Speechismadeupofsoundwavesthatvaryin(frequent)andintensity.20.(2023·高二单元测试)Itis(crucial)importantthatwearereadyforthistime.考点二、重点词块选词填空选词填空(可适当改变形式)castnewlighton,inthecircumstances,inviewof,laythefoundationfor,becomprisedof,differfrom,makesenseof,apply...to...1.Canyou________whatthisAmericanissaying?

2.Thenurse________pressure________thepatient’swoundtostopthebleeding.3.Humangenomeresearchis________Alzheimer’sdisease.

4.Theresearchcan________thefurtherdevelopmentofspaceexploration.

5.Agas________asolidinthatithasnodefiniteshape.

6.________theseriousnessofthematter,I’llspeakfromthewrittentext.

7.________itisnecessarytocanceltheoriginalplanofthemeetingtobeheldnextweek.

8.Asisknowntoall,afootballteam________elevenplayers.

考点三、重点句型完成句子1.________________,youcan’tarrivethereinonehour.

尽管你走得快,你也不能在一小时内到那里。2.Thesephenomenaaresupposedto________________astheymayaffectweatherandradiocommunication.

人们认为这些现象很重要,因为这些现象会影响气候和无线电通讯。3.I’mstudyinghard________________myclassmates.

我正在努力学习,以便能赶上我的同学。4.Ihaven’tbeentoschoolfortwoweeksandhavemissedalotoflessons.________I’mworkinghardatmylessons.

我两周没上学了,落下不少功课。那就是我努力学习的原因。5.Thoughhehasnevermetanyaliens,hebelievesthey________________.(对谓语动词进行强调)虽然他从没见过外星人，但他相信他们确实存在。考点四、重点语法单词语法填空1.ourparentsdemandofustounderstandisthatwestudyhardforthedevelopmentofourcountry.2.(2023上·山西大同·高二大同一中校考阶段练习)Eventually,Idecidedtofollowherandhappenedtrulyamazedme.3.thereislifeonthemoonisaninterestingquestion.4.ThesettingofthefilmZootopiamaybelimitedinthecityfullofkindsofanimals,butitexposesabouthumannatureisquitebroad.5.(2023上·广东东莞·高二校考阶段练习)Itremainstobeseenthemeasureswilltakeeffectornot.6.Itisbynomeansclearthelocalgovernmentwilldowiththebuildingsofpoorquality.7.IhopeImentionedabovewillbeofgreatusetoyoursurvey.8.However,cloningtechnologyshouldbedevelopedornotisdebatable.9.(2023上·广东揭阳·高二统考期中)theearthgoesaroundthesunisafactknowntoall.10.(2023上·福建厦门·高二厦门双十中学校考阶段练习)Itremainsunknowntheplanwillbecarriedoutornot.11.(2023上·海南海口·高二校考阶段练习)wecanstartofftomorrowornotwilldependontheweather.12.(2023上·四川成都·高二校考期中)(who)breaksthelawwillbepunished.能力提升阅读理解(2023上·西藏拉萨·高二统考期末)Thejourneytothemoonhasbeenthefirststeptowardsfutureexplorationinspace.ThedistancebetweentheMoonandEarthisveryshortindeedwhencomparedwiththedistancesbetweenEarthandtheotherplanets.Mars,thenearestplanettoEarthismillionsofmilesaway!Travellingtotheplanetswillbeman’snextaim.Suchtravelswillbemorechallengingthanthetriptothemoonandcertainlymoreadventurous.Recently,twoAmericanspaceships,Vikings1and2,landedonMarstryingtodiscoverwhetherthatplanethasanylifeonit.SofarthesignsoflifeonMarshasneitherconfirmednorruledout.RussianshavediscoveredthatthesurfaceofVenus(金星)issohotthatitisalmostcertainthatthereisnolifethere.AlsotheatmosphereofVenusisextremelydenseandthepressureisnearlyahundredtimesgreaterthanthatoftheEarthsatmosphere.Scientistsbelievemanmayfindplanetswhichhavethesameconditionsasthosewehaveonearth,butmanshouldrealizeEarthwillbehisonlyhomeforalongtimeandbegintoloveandcareforit.1.Accordingtothepassage,travellingtotheplanetswillbe______.A.mucheasierandevenmoreinteresting B.farmorechallenginganddangerousC.man’sfinalaim D.man’sfirststep2.WhatAmericanspaceshipstriedtodiscoveraboutMars?A.whetherMarshasanylife B.whatisMarslikeC.whatistheatmosphereofMars D.whetherMarshaswater3.Fromthepassage,wecanlearn______.A.thereislifeonMarsB.thereisnolifeonMarsC.theatmosphereofMarsisnotsodenseasthatofVenusD.scientistswillhavelittlehopetofindtheanswers4.Scientiststhinkweshouldtakecareofourearthbecause______.A.nootherplanetsaretotaketheplaceoftheearthB.everythingneededisprovidedbytheearthinC.theonlyhomeofmanwillbetheearthforalongtimeD.thedreamtofindanotherhomeformanwillcometrue二.完形填空GeorgeEdwinMuellerwasbornin1918.Asachild,helovedtoseehowthingsworked.Inspiredbyhisfather’swork,heoftenfittedtogetherpartsofradiosandmodelplanes.Whenhecompletedhisuniversity1,heworkedforafewyears,andthenwentonto2hisdoctor’sdegree.In1963,DrMuellerwasinvitedtomanagetheApolloprogramme.By1961,Ru