请假条

假设你叫Tom，你昨天在学校游泳池游泳患了感冒，今天早上觉得头疼，你母亲给你量了体温后，发现你发烧，便带你去看医生，医生说你需要卧床休息两天，特向老师请假。给老师写一张70—100字的请假条  

     时间：2005年6月8日。

One possible version:

Dear Sir, 
   I'm sorry to tell you that I can't go to school today, I've caught a cold because I swam in the school's swimming pool yesterday. 
   This morning I had a headache. After taking my temperature, my mother found that I had a high fever, immediately she took me to see a doctor, who advised me to stay in bed for 2 days. Now I am writing to you to ask for 2 days' sick leave. 
   With best wishes