阅读理解：
Birth,marriageanddeath:thesearethegreatesteventsinhumanlife．Manythings,goodandbad,canhappentousinourlives．Yettherearethreedayswhichareusuallymarkedbysomekindofspecialceremony:thedayweareborn;thedaywegetmarriedandthedaywedie．Thesearethethreemaineventsinlife．Weonlyhaveachoiceinthesecondofthese:wecanchoosewhetherornottomarry．Butwehavenochoiceinbirthordeath．Allhumanbeings-fromthemostprimitive(原始)tothemostsophisticated(复杂)areaffectedbythesethreeevents．Theonlythingthatdiffersineachsocietyisthewaytheseeventsarecelebrated．Yetallsocietiessharecommoncharacteristics．Birthisatimeofjoy．Theproudparentsreceivecongratulationsandpresentsonbehalfofthenew-born．Marriageisalsoatimeofjoy．Theyyoungcouplegothroughaspecialweddingceremonyandreceivepresentstohelpthemsetuptheirhome．Deathisatimeofsorrowandismarkedbyaspecialceremonyandmourning(哀掉)．Thedatesofallthreeeventsareusuallyremembered．
1．Allhumansocieties______．
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A．markthethreemaineventsinlife,butindifferentways
B．arenotaffectedbythesethreeevents
C．markthesethreeeventsinexactlythesameway
D．arethesame
2．Thedatesofthethreemaineventsinlifeareusuallyrememberedbecause______．
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A．ofthecelebrations
B．theyareimportant
C．therearespecialceremonies
D．societiessharecommoncharacteristics
3．Therearethreedays______areusuallymarkedbysomekindofspecialceremony．
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A．whoB．thatC．whomD．whose
4．Thesethreeevents______allhumanbeings．
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A．haveaffectedB．affected
C．areaffectingD．affect
5．Thesearethegreatest______inhumanlife．
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A．situationsB．happenings
C．conditionsD．facts
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