Dear Peter£¬ Our school is planning to hold an American Film Festival next month. I'm writing to ask you to come and give a talk on American films and filmmaking industry. It will help us understand how the industry has developed into big business as it is today. This understanding should go a long was toward increasing their knowledge of American culture in general. Do yiou think one and a half hours will be enough? Please let me know as soon as possible so that I can make arrangements. I'm looking forward to seeing you and enjoying the talk. With best wishes£¬ Yours£¬ Li Hua