假设你是你校学生会主席王海。针对目前你校学生英语写作中存在的问题，你准备邀请英语专家frank jason教授来你校做一次关于如何提高英语写作水平的讲座。请根据以下要点给frank jason 写一封邀请信。要点： 1. 邀请的目的； 2. 讲座时间、地点； 3. 讲座内容。 dear professor frank jason,
i am wang hai, the chairman of the student union of our school._____
yours,　　 wang hai

dear professor frank jason,　　 i am wang hai, the chairman of the student union of our school. i am writing to invite you to give a lecture to the students in our school on how to improve the english writing from 22nd to 25th, september, 2011.english writing has always been our headache and we’re trying every means to improve it but have little good result. it would be our great honor if you could come to give us a lecture on it. enclosed in this letter is a time schedule for it. the school would cover the traveling and other expenses. please let me know your date of arrival if you can come. if you have any questions, please don’t hesitate to contact me. look forward to your favorable reply. 　　 yours,　　 wang hai