Dear Mr. Brown,
I beg to inform you that I shall be unable to come to school / your class today because of an important business in the family.
Your loving student
J. Smith
Dear Mr/Ms XXX;
Today I'm writing to you to ask for a five-day leave, for I've got cold last night with carlessness.
This morning my mother took me to see the doctor,who told me to stay in bed for some days. So I am very sorry to be absent from school, especially your interesting lessons. I'll be sure to make up for the missed lessons after I recover from the illness.
Yours ever,
XXX.
To: Mr. John Smith, General Manager
From: George Chen, Accounting Department
Date: January 22, 20xx
Subject: Application for annual leave
Dear Mr. Smith，
I would like to apply for an annual leave from January 25th to 31st.
As you may know the Spring Festival is falling on February 1st this year. It's the most important holiday in China and offers the best occasion for family reunion. However, over the past 3 years I missed the reunions due to tight work schedule. Now that I have wrapped up my work for this year, I would like to go back to my hometown to pay filial piety to my parents and help my sole brother prepare his wedding on January 28th.
It's indeed double happiness for my family that I would like to be part of. Coupled with the official holidays for the Spring Festival, I will have two weeks off which will definitely gear me up for better work in the new year. I'm looking forward to your kind answer.
Best regards,
George Chen