dear mr/ms xxx:
today im writing to you to ask for a five-day leave, for ive 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. ill be sure to make up for the missed lessons after i recover from the illness.
yours ever,
xxx
To:dear teacher
From:**,College of Computer and Information Engineering
Date:April 12th,20xx
Subject:Casual Leave of Absence
Sir,I would like to know if we could ask for a casual leave of absence for one day on April 14th,I get a fever,then I hope I can go to hospital this day.I apologize for my absence from the english oral class .
I do hope you can forgive me.Thank you!