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  • 完形填空
    题干:AreweatthebeginningofanotherAgeofExploration?Perhapsevenmoreimportantly,areweatthebeginningof(1)AgeofColonization?Asthepopulationoftheworldincreasestowardsthepoint(2)theearthcannolongersupportallthepeople(3)onit,thesecondquestionbecomesurgent.Willwediscoveranewworld,(4)Columbusdid,onwhichhumanlifewillbepossible?Atthispointinthespaceage,noonecanreallyanswerthesequestions.Wecansay,(5),thatwewillnotseetomorrowthekindofspacetravelthat(6)fictionandthemovieshaveshown.Itwillbealongtimebeforewehaveflightsthatrun(7)tohumancoloniesonthemoonorononeoftheplanets.Wearenotevengoingtobeableto(8)immediateadvantagesofthemineralsthatwemayfindontheplanets(9)ourownsolarsystem.Greatproblemsmustbesolved(10)wecouldsendcolonistsoutintospace.Thedistancesthatmustbe(11)andthelengthoftimeittakestodothatcanhardlybe(12).Therearealsodangersthatwestilldonotreallyunderstandfromradiation,forexample,orfrompiecesofmatters(13)inspace,orfromcontaminationfromformsoflifethatmight(14)there.Thereisalsoneedforhumanstotaketheirownenvironmentintospace(15)them.Sofarno"island"hasbeendiscoveredinspaceonwhichpeoplecanexistwithoutsystemsthat(16)life,andthesesystemsmustaccompanyanyfuturespace(17).Finally,onthemostpractical(18),therehastobeenormousexpense(19)inspaceexploration.TheU.S.andRussiangovernmenthavealreadyspentbillionsofdollarsforprojects(20)whichtheycanreceiveareturnonlyinknowledgeandnotinmoney.
    题目:(14)
  • A 、revive
  • B 、exist
  • C 、survive
  • D 、live

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【正确答案:B】

动词辨义。exist“存在”,定语从句的主语that代替forms of life,表示life的存在要用exist。revive“苏醒,复活”;survive"幸存,生还”;live"生活,居住”。

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