再加几个字达到“不少于80字的要求”哦：
April 8 （靠右端）
Dear xx (Mr.XX,Madam XX,Miss XX表示老师）：
An accident happened to me yesterday on my way back home.I fell down from my bicycle and my legs were wounded.However,I met a kind young man who sent me to the nearby hospital for treatment.The doctor told me not to walk and have 3-day rest.So I would like to ask for a sick leave for 3 days.I will be reviewing homework at home these days and be back in 3 days.Please be kindly noted about it and approve my leave application.Thank you very much.
Yours Sincerely,
Zhang Lin