I am excessively sorry for my absence yesterday when you come to see me during your trip. Now, I am writing you this letter of apology to show my deep regret. Please accept my sincere apology with gratitude.
I hope you will understan me and excuse me for my absence. The reason for my absence was that I had an engagement with some friends and, ignorant of your visit, accompanied them to the cinema. Besides, not until 9 oclock in the evening did I come back. Therefore, it is not in my power to arrange time to meet you.
Naturally, I hope you wont leave the city this week so that I can call on you. I shall be obliged if you will kindly tell me when and where you are at convenient. In that case I can take you to some places that may interest you. I hope to see you soon.
Sincerely yours,
Li Ming
7)倡议书结构公式
右上角：日期
左上角：称呼
正文：第一段：交代写信目的`，倡议的人群和倡议的主题。
第二段：介绍倡议针对对象的具体情况和倡议的具体内容(如捐钱、捐物)。
第三段：提供联系方式，再次发出倡议，呼吁大家参与，并表示感谢。
右下脚：署名
学识谷
