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一、dearsir/madam:
i"mdelightedyouhaveacceptedour
i女itationtospeakattheconference
in[city]on[date]。
asweagreed，youllbespeakingon
thetopic""from[time]to[time]。there
willbeanadditionalminutesforquestions。
wouldyoupleasetellmewhatkindof
audio-visualequipmentyoullneed。ifyou
couldletmeknowyourspecificrequirements
by[date]，illhaveplentyoftimetomake
surethatthehotelprovidesyouwithwhat
youneed。
thankyouagainforagreeingtospeak。
ilookforwardtohearingfromyou。
sincerelyyours，
[name]
[title]
二、dearsir/madam:
thankyouforyourletterof[date]。
imgladthatyouarealsogoingto[place]
nextmonth。itwouldbeagreatpleasure
tomeetyouatthe[exhibition/tradefair]。
ourcompanyishavingareceptionat
[hotel]ontheeveningof[date]andiwould
beverypleasedifyoucouldattend。
ilookforwardtohearingfromyou
soon。
yourssincerely，
[name]
[title]
三、dearsir/madam:
[organization]wouldverymuchlike
tohavesomeonefromyourcompanyspeak
atourconferenceon[topic]。
asyoumaybeaware，themissionof
ourassociationistopromote。manyof
ourmembersareinterestedinthe
achievementsyourcompanyhasmadein。
enclosedisourpreliminaryschedulefor
theconferencewhichwillbereviewedin
weeks。illcallyou[date]toseewhofrom
yourcompanywouldbewillingtospeakto
us。icanassureyouthatwellmakeeverythingco女enienttothespeaker。
sincerelyyours，
[name]
[title]
首先是主人（邀请人）的姓名（要用全称）或头衔；第二部分是“requeststhepleasure(或者honor)of"，相当于汉语的“恭请”第三部分是客人（被邀请人）的姓名（要用全称）（加’s）或用your(泛指）；第四部分是“presenceat"相当于汉语中的“光临”第五是日期；第六是钟点第七是地点给你的例子:mr。xxxxrequeststhepleasureofmr。xxx"spresenceatpartyonfriday，the18thofjanuaryat7o"clockp。m。at花xinghotelxxxxroad答案补充
dearmrbrown，wetakepleasureini女itingyoutopresenttheannualgatheringofimportandexportcorporationintianjin。onnovember20thxx，in花xiahotel。wearelookingforwardthatyoucanmakeareportonpotentialforeconomicdevelopmentintianjin。pleasefaxthedateofyourarrival，enableingustomakethenecessarypreparations。yoursfaithfully，limingpublicrelationsmanager