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!