七选五，根据短文内容，从选项中选出能填入空白处的最佳选项。有两个多余选项。
TheInternethasopenedupawholenewonlineworldforustomeetchatandgowherewe'veneverbeenbefore．
Butjustasinface-to-facecommunicationtherearesomerulesofbehaviorthatshouldbefollowedwhenonline．1．Imaginehowyou'dfeelifyouwereintheotherperson'sshoes．
Foranythingyou'reabouttosendaskyourself“WouldIsaythistotheperson'sface?”Iftheanswerisnorewriteandreread．2．
Ifsomeoneinthechatroomisrudetoyouyourinstinct(本能)istofirebackinthesamemanner．Buttrynottodoso．3．Ifitwascausedbyadisagreementwithanothermembertrytodealwiththesituationbypolitelydiscussingit．Remembertorespectthebeliefsandopinionsofothersinthechatroom．
．Offeradvicewhenaskedbynewcomersastheymaynotbesurewhattodoorhowtocommunicate．Whensomeonemakesamistakewhetherit'sastupidquestionoranunnecessarilylonganswerbekindaboutit．Ifit'sasmallmistakeyoumaynotneedtosayanything．Evenifyoufeelstronglyaboutitthinktwicebeforesayinganything．5．Atthesametimeifyoufindyouarewrongbesuretocorrectyourselfandapologizetothosethatyouhaveoffended．4
A．Everyonewasnewtothenetworkonce．
B．Ifyoudodecidetotellsomeoneaboutamistakepointitoutpolitely．
C．It'snaturalthatsomepeoplespeakrudelyormakemistakesinlife．
D．Thebasicruleistotreatothersinthesamewayyouwouldwanttobetreated．
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