敬爱的马老师：
很抱歉我今天不能去上学了。昨天夜里我妈妈发高烧，咳嗽得厉害，我想她可能是得了流感。昨天晚上她休息得不好，而且今天很虚弱，所以我陪妈妈去天坛医院，然后在家照顾她。因此我不得不请假。如果您能准假我会非常感激。
您的'学生 李丽
敬爱的马老师：
很抱歉我今天不能去上学了。昨天夜里我妈妈发高烧，咳嗽得厉害，她可能得了流感。因为今天我要带妈妈去天坛医院，然后在家照顾她，所以不能去上学了。因此我想跟您请一天假。如果您能准假我会非常感激。
您的学生
李丽
An Application For Annual Leave
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
Dear Mr/Ms Jiang
I was unable to come to 1st and 2nd period today.Due to the rain yesterday, I was wet and had temperature at night. The doctor adviced me to rest for several days and after my recovery, I will attend school as soon as possible.
I am sincerely sorry about the inconvenience. However, I would like to have your permission. Also, afterwards I would phone you and there's the certificate by the doctor.
Li Tie
October 21st 20xx
Dear teacher:
I'mxx.I'm sorry that I can't go to school today.Because I have a fever.I feel very bad now.So I want to stay at home to take a rest.I hope you can permit me to stay at home.
Yours.
xx