Hello, teacher! I'm xxx, a student in Class X, Grade X. I can't do exercises because I'm not feeling well. I hereby ask for leave! I hope to approve () this vacation request: xxxxxxx, xx, xx, xx.

Dear teacher (surname): I need to take a day off because of a cold and headache. I need to go out and see Mr. Wang Bo.

I am writing to you today to ask for five days off, because I accidentally caught a cold last night. My mother took me to see a doctor this morning, and the doctor asked me to stay at home for a few days. Therefore, I feel sorry for my absence from class, especially for not being able to attend your interesting class. I have to make up for the missed courses after my illness. Salute to your students: xxx.