商务英语写作指导：商业英文书信（1）

　　一。 商业书信常用开头语 Opening Phrases & Sentences Generally Used In Business Letters 　　（1）特此奉告等

　　To inform one of； To say； To state； To communicate； To advise one of； To bring to one's notice （knowledge）； To lay before one； To point out； To indicate； To mention； To apprise one of； To announce； To remark； To call one's attention to； To remind one of； etc.来源：和谐英语

　　21. Your favour of the 5th May is duly received

　　22. Your favour of the 5th May is now before me

　　23. Your promised letter under date （of） the 5th June has just reached us