急求一篇英语作文,要求70字,假设你是班长,班上要举行一次英语讲座,先用口头通知的形式把这次活动事项告诉同学们.讲座内容

May I have your attention,please?I have an announcement to make.Doctor White,a teacher in a university in America will give us a speech about the differences of English in the US and England on January 12th.It will start at 3:00 on Thursday afternoon in the class 302.This speech will last about two hours.After this speech,we can group discussion .Take this chance and you can ask questions about speech or learning English.Doctor White will be willing to answer. That's all.Thank you.