One possible version：   Dear Editor Pm very happy to have the chance to show you my plan for the graduation ceremony. The ceremony will be held in our school hall on July 1st. I have planned three activities for it. First of all we would like to invite our headmaster to make a speech and give us his best wishes for a bright future. After that one of the students will read a thank-you letter to ail the people who have helped us. In the end some pictures will be shown to share the happy times we have had together.  This is what we will do. I hope you will choose my plan.Yours Li Hua

One possible version：   Dear Editor Pm very happy to have the chance to show you my plan for the graduation ceremony. The ceremony will be held in our school hall on July 1st. I have planned three activities for it. First of all we would like to invite our headmaster to make a speech and give us his best wishes for a bright future. After that one of the students will read a thank-you letter to ail the people who have helped us. In the end some pictures will be shown to share the happy times we have had together.  This is what we will do. I hope you will choose my plan.Yours Li Hua