阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。IhadafriendwhovisitedmefromoutoftownandIwantedtoshowhimtheCNTower.Itwasoneofthetalleststructuresontheearth.SoIthoughtitwouldoffera(n)____sight.Wewerestandinginlinefor45minutestoenjoythe____uptothewatchpoint.Whenwegotthere,wewentaroundthe____ofthetowerandsawthehardwirefence____tothestructureservingasabarrier.Wewentbackinsidetolookfortheglassfloorthatprovidedadirectview____.Assoonasbothofus____,westoppedbeforewalkingontoit.Wefoundthatourlegsbeganto____.Istoppedforaminuteconsideringthestep,takingseveralsecondsto____theedgebeforemoving.AndthenIhadathoughtinmymind:“Itisfar____comparedtoanyotherfloorinthisbuilding.Thereisnorealdangertome-it’s____anillusion(幻觉).Lookatallthepeoplestandingonit,andthinkaboutthosewhohavestoodonitbefore.”Ibeganto____thatstepontotheglassfloor.Ididn’tlookdown____notforafewminutes.Iwalkedonthe____andlookedaroundandthoughtabouthow____theexperiencewas.Ievenfoundmyselfjumpingupanddown.Therewasno____,anditwascertainlyanillusion.Iconsideredhowmanythingsinourliveswe____andexactlyhowmanyofthemareactuallyillusions.Ithoughtaboutallthethingswe____ourselvesfromdoingbecausewehave____ourselvesintothinkingthere’srisk.IthoughtaboutallthethingsthatIstillhaveyettodothatappeared____;Iwasgladtodiscoverthatalthoughfearisn’tastrangertome,mydesiretolivealifewithout____hasamuchstrongerpull.