根据下面短文内容，在短文的空格处填上一个恰当的词，使短文完整、通顺．
Whenyoutalkwithsomeone，you'llneedtoendyourconversationatsomepoint．Andtherearemanyreasonswhyyouneedtodothat．Eitheryouortheotherpersonmayneedtocontinueanactivitysuch （78）___workingorshopping．Oryoumayhaverunoutofthingstosay．Youjustwanttokeeptheconversationshort．
But （79）___doyouendaconversationinapoliteway？Itmaydependonwhereandhowtheconversationstarted．Itmayalsodependonyourrelationshipwiththe （80）___ person．Ifyoualreadyknowthatperson，youcanjustsay，"Ineedtorunnow．"Oryoucansay，"I'llcatchyoulater．"Youmayalsogiveareasonforendingtheconversation．"Ireallyneedtogo-mypianoclassstartsinten （81）___．"
Perhapsyoujusrmeetsomeoneinasocialsituation，andyouhaveanicetalk．Butthenyouhavetogo．Youcansay，"Itwasnicemeetingyou．Maybewecantalkhappily（82）___ sometimeinthefuture．"
Anotherwaytoendaconversationistomakeiteasyfortheotherpersonto（83）___．Ifyouseetheotherpersonisalreadynotpatient，youcansay，"Well，I'msureyouhavealottodotoday．"
Youcouldusethese （84）___toendaconversation，andyoushouldnoticethatothersmayalsousethem．（85）___theydoso，youshouldknowthatit'stimeforyoutostopandgetonwithyourday．
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