写英语请假条我发烧了；120字左右.帮帮忙

To:dear teacher
From:**,College of Computer and Information Engineering
Date:April 12th,2010
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!

Dear sir,
I'm sorry to tell you that I will be absent . I have a fever. The doctor told me that I have to stay in bed and have a good rest for two days.So I have to ask you for a two-day leave.Thank you.
Yours ..

Dear sir,
I'm sorry that I will be absent in your class today, for I have a fever and I have to stay in bed for a rest. Thank you for your permission.