teacher,
I'm sorry to tell you that I can't take class.I have a bad cold.
I felt sick last afternoon.My mother was worried and took me to see the doctor immeditely.The doctor told us that I had a bad cold.He told me to take medicines and was better to take a rest.As a result,I want to stay at home and can't go to scholl.I think I will get well soon.
sincerely
XXX