求一份英语道歉信上星期四旷了一节英语课,星期三练功练的太晚没有休息好.需要一个道歉信,如果理由不好帮我改改啥的.一百字

Dear Sir,
I am writing to give my apologies to you for having skipped last Thursday's class.
Last Thursday was a bad day to me.When I got up that morning,I found that I was not quite myself.My mother sent me to the hospital and had me examined.Surprisingly,I was sick due to the over exercise the night before.The doctor gave me some pills.Now,I am much better.
I know it is my fault to to have missed one of your classes.However,given all my sufferings,I truly hope you can forgive me.I will work hard to make up for the missed class.
Yours sincerely
XXXX