牙痛不能上课的英文请假条

　　class 1 april 10, year

　　to department office

　　ms. smith,

　　owing to a severe toothache, i am unable to attend classes today. i now submit a medical certificate issued by the doctor. /i enclose a medical certificate from the doctor.

　　hoping you will excuse my non-attendance.

　　yours respectfully,

　　li ming