Ⅵ短文改错（10分）

Mr. Lin:

I’m serious ill today and can’t go to school. I’ve caught a bad cold because I swim with some of my classmates yesterday. This morning I had a headache . After take my temperature, my mother found that I had light fever. So she took me to see a doctor. The doctor said whether I had caught a bad cold and advised me to stay in the bed for several other days. So I am writing to ask about a sick leave of three days. As for the lesson to be missed during the absence, I will do the best to make them as fast as I get back to school .

Yours: Wang ming

做口腔护理时，如有活动性义齿一般先取下面义齿，后取上面义齿，用冷开水冲洗刷净，浸于清水中保存。