For this part, you are allowed 30 minutes to write a letter—on behalf of the Students’’ Union and the Academic Lectures Association—to invite a visiting foreign professor, David, to deliver a presentation to the students in your university. You are NOT allowed to include the name of your university in this letter. You should write at least 150 words following the outline given below.1．对这位知名的外籍教授的到来表示欢迎2．表达希望该教授就某个话题在学校进行讲座的希望和对讲座的一些基本设想3．希望教授可以接受邀请，并对教授的宝贵时间表示感谢