Dear Peter,
I am really sorry to hear that you were caught into a car accident on your way riding to school and I represent all the students of our class to convey greetings to you.Besides,I heard that you have already had a operation on your legs,I wonder whether you can leave the bed to take a walk.We are all worried about you all of us will come to see you on this Saturday in the morning.In addition,you don't have to worry about the classwork you missed,for we are ready to help you make up all the classwork you missed.Therefore,you should just keep your mind on recuperating and we will do as much as we can to help you.
Best wishes,
Lihua
希望能帮上你!