在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给出。
WhenIpassedthroughtheAtlantaairportonemorning,Icaughtoneofthosebusesthatt____thetravelerstotheirboardinggates(登机门).Thefreebusesrunbackandforthalldayslong.Notmanypeoplethinkthemfun.ButIheardlaughter.Atthefrontofthefirstbus,therewereafatherandhisson.Hissonwasa____fiveyearsold.
“Herewego!Holdontome!”thefathersaid.“Lookoutthere!Seethepilot!Ibethe'swalkingtohisplane.”Thesonstretchedhisnecktolook.
AsIgotoff,Iremembereds____Ihadwantedtobuy.Iwasearlyformyflight.SoIdecidedtogoback.WhenIwentbacktothebusf____mygate,Isawthemanandhissonhadreturned,too.“Iwanttoridemore.”“Itisfun!”hissonanswered.“Allright,”thefatheranswered.Whenthedooro____,weallgoton.Irealizedthatthefatherandhissonwerejustridingthisshuttle(梭)together,makingitexciting,sharingeachother'scompany.
Thereareparentswhocanaffordtos____theirchildrentoEuropeorDisneyland,butthechildrencanturnoutrotten(堕落的).Thereareparentswholiveinmillion-dollarhouseandgivetheirchildrencarsandswimmingpools,butsomethinggoeswrong.Why?
Theanswerissosimple:parentswhocareenoughtos____time,topayattentionandtotrytheirbest.Itdoesn'tcostacent,butitisthemostvaluablethingintheworld.