找这套就可以了 　　一、Dearsir/madam: 　　ImdelightedyouhaveacceptedourinvitationtospeakattheConference 　　in[city]on[date]. 　　Asweagreed,youllbespeakingonthetopic""from[time]to[time].There 　　willbeanadditionalminutesforquestions. 　　Wouldyoupleasetellmewhatkindofaudio-visualequipmentyoullneed.Ifyoucouldletmeknowyourspecificuirements 　　by[date],Illhaveplentyoftimetomakesurethatthehotelprovidesyouwithwhatyouneed. 　　Thankyouagainforagreeingtospeak.Ilookforwardtohearingfromyou. 　　Sincerelyyours, 　　[name] 　　[title] 　　二、Dearsir/madam: 　　Thankyouforyourletterof[date].Imgladthatyouarealsogoingto[place]nextmonth.Itwouldbeagreatpleasure 　　tomeetyouatthe[exhibition/tradefair]. 　　Ourcompanyishavingareceptionat[hotel]ontheeveningof[date]andIwouldbeverypleasedifyoucouldattend. 　　Ilookforwardtohearingfromyousoon. 　　Yourssincerely, 　　[name] 　　[title] 　　三、Dearsir/madam: 　　[organization]wouldverymuchliketohavesomeonefromyourcompanyspeakatourconferenceon[topic]. 　　Asyoumaybeaware,themissionofourassociationistopromote.Manyofourmembersareinterestedinthe 　　achievementsyourcompanyhasmadein. 　　Enclosedisourpreliminaryschedulefortheconferencewhichwillbereviewedinweeks.Illcallyou[date]toseewhofrom 　　yourcompanywouldbewillingtospeaktous.Icanassureyouthatwellmakeeverythingconvenienttothespeaker. 　　Sincerelyyours, 　　[name] 　　[title] 　　四、Dearsir/madam: 　　Wewouldliketoinviteyoutoanexclusivepresentationofournew[product].Thepresentationwilltakeplaceat[location],at[time]on[date].Therewillalsobeareceptionat[time].Wehopeyouandyourcolleagueswillbeabletoattend. 　　[company]isaleadingproducerofhigh-quality.Asyouwellknow,recenttechnologicaladvanceshavemadeincreasinglyaffordabletothepublic.Ournewmodelsoffersuperbqualityandsophisticationwitheconomy,andtheirnewfeaturesgivethemdistinctadvantagesoversimilarproductsfromothermanufacturers. 　　Welookforwardtoseeingyouon[date].Justcallourofficeat[phonenumber]andwewillbegladtosecureaplaceforyou. 　　Sincerelyyours, 　　[name] 　　[title] 　　五、Dearsir/madam: 　　On[date],wewillhostaneveningofcelebrationinhonoroftheretirementof[name],Presidentof[company].Youare 　　cordiallyinvitedtoattendthecelebrationat[hotel],[location],on[date]fromtop.m. 　　[name]hasbeenthePresidentof[company]since[year].Duringthisperiod,[company]expandeditsbusinessfromto.Nowitsouropportunitytothankhimforhisyearsofexemplaryleadershipandwishhimwellforahappyretirement.PleasejoinustosayGood-byeto[name]. 　　Seeyouon[date]. 　　Yourssincerely