英语作文!请你写一封信给你的朋友TOm,告诉他你今天下午不能和他一起去图书馆,因为你生病了.你发烧头疼

Dear Tom,
I'm sorry that I cann't go to the library with you this afternoon.I'm ill and have a headache.
I will go to the hospital this afternoon and have a good rest.
Yours Mike
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