【DEveryoneknowsyoumustexerciseregularlytokeepgoodhealth.Indeed,stayingphysicallyfitisabigpartofourculture.weconsider（orrightlyso）thathealthypeopleareattractivepeople.Sincemostofuswanttobeattractive,there】

　　D

　　Everyoneknowsyoumustexerciseregularlytokeepgoodhealth.Indeed,stayingphysicallyfitisabigpartofourculture.weconsider（orrightlyso）thathealthypeopleareattractivepeople.Sincemostofuswanttobeattractive,thereisnoshortageofexerciseclubs,trainingvideos,magazinesandbooksofferingtohelpusstayphysicallyfit.

　　Unfortunately,however,ourculturedoesn’tplacethesameemphasisonmentalfitness.Althoughwetendtolikemenandwomenwithstrong,healthy-lookingbodies,wedon’thavethesamedegreeofrespectorattractionforsmart,educated,mentallyhealthypeople.Thisisapity,becausetherearegreatrewardsforpeoplewhohavedevelopedtheabilitytothinkwell.

　　Ifyourmindiswelltrainedandflexible,youwillbeabletounderstandagreatdealofwhathappensaroundyou.Andifyouarealsowelleducated---thatis,ifyouunderstandbasicscience,mathematics,music,art,literature,historyandsoon---youwillfinditmucheasiertomakegooddecisionsthroughoutyourlife.Overthelongrun,thisleadstoasenseofcontroloveryourdestinyandamuchbetterlifethanotherwise.

　　Peoplewhoarepoorlyeducatedorwhodon’tthinkwell---thatis,peoplewhoarenotmentallyfit---seethingsdifferently.Theirworldiscontrolledbymysterious,oftenmalevolent（恶意的）forces.Suchpeoplelivewithinasystemtheywillnevermaster,forcedtofollowrulestheywillneverunderstand.Althoughitmaynotbeobvious,mostspendtheirlivesbeingmanipulated（控制）byothers.Theyaretoldwhattodo,whattothink,howtospendtheirmoney,andwhattheyshouldandshouldnotaspire（渴望）toinlife.

　　Inmyopinion,ifyouwanttolivewell,youmustbeabletouseyourmindwell.Forthisreason,Iwantyoutobeabletoconcentrate,tosolveproblems,tounderstandcomplexideas,andtothinkclearlyandquickly.Suchskillswillmakeiteasierforyoutomakeinformeddecisions,understandcurrentevents,choosegoodfriends,manageyourmoneywell,makewiselone-termdecisionsandappreciatemusic,artandliterature.

　　Thekeytodevelopingsuchskillsistoenjoylearning,andtohavetheabilityandmotivationtoteachyourself.

　　63.Thewriterofthepassagefeeldisappointedthat____.

　　A.toolittlehasbeendonetohelppeopletokeep