Dear XX:
I am sorry to hear that you have been sick.In our daily lives,you have given us too much love and care sometimes regardless of your self.It is because of your hard work pay,we can continuously to make progress.Each class classmate all expecting you to recover as soon as possible.While you were away,we all miss you very much.For us you are more than a teacher.We all love you,hoping you can recover soon.Best wishes!
Your XX