我校将举办英语幽默故事演讲比赛英语

One possible version:
Boys and girls, I have an announcement to make.
In order to provide an atmosphere of learning English and arouse the students’ interest in English, we will have an English speech competition.
The competition will be held at our lecture hall on the afternoon of May 22nd. There will be eight topics for all the contestants to choose from. Before the speech, every contestant will have to give a self-introduction in twenty seconds and the speech can’t last more than three minutes. We’ll award the first, second and third prizes for each grade. Hurry up to the office of the Students’ Union before May 15th to enter your names for the right opportunity offered to you!
That’s all. Thank you.

略

　　research the school decided to learn english in schools in order to create an atmosphere to stimulate students interest in learning english, our school will be conducted in english speech contest.