书面表达 请依据以下信息写一则海报.

参考范文：

POSTER

We are going to have an English-speaking contest for senior students so as to improve our oral English．It will be held in the auditorium on the 5th floor in the teaching building at 4∶00 p. m．June 9th．Those who want to take part in the contest are supposed to come to sign up at the office of the Student Union before May 25th．All the senior students are welcome to join in the contest．The first five winners will be given prizes．Please try your best and get ready in time．

Wish you success!

The Student Union

思路点拨：海报和书面通知差不多，正文没有硬性规定的格式，可以根据海报内容灵活掌握。但内容要包括所要宣传的活动的所有内容，例如：活动的主题、目的、时间、地点、费用等，为了使内容更加鲜明清晰，也可以增设小标题。主体内容可以分段也可以不分。