Dear Miss White,

亲爱的怀特老师：

I'm sorry. I can't go to school today.

很抱歉，我今天不能去上学了。

I have a bad cold.

我得了重感冒。

I have a headache.

我头疼。

I need to see a doctor.

我需要去看医生。

I will stay at home and have a rest.

我会待在家里休息。

I will do my homework at home.

我会在家做作业。

I will go to school tomorrow.

我明天会去上学。

Thank you for your understanding.

感谢您的理解。