假如你是李华，本周日上午你班外教要组织你们进行一次春游活动，但你昨天下午打篮球时扭伤了脚，医生建...

Dear teacher，
I am so sorry that I can't take part in the spring outing this Sunday morning,
as I sprained my ankle yesterday in one basketball game.
And the doctor suggested me to take a rest at first for recovery . Hence I want take your permit for my absence.Thank you very much.
Yours,
Li Hua

Dear teacher，
I am afraid that I can't participate in the spring outing this Sunday morning, for that I sprained my ankle yesterday in a basketball game. And the doctor suggested me to take a rest
for recovery.Hence I want to ask for your permit for my absence.Thank you very much.
Yours,
Li Hua