急求大学英语演讲比赛即兴演讲的题目!

推荐以下演讲题目,参考：
1.“Challenges and Opportunities for College Students in Today’s Competitive World”（在当今竞争的世界中大学生面临的挑战和机遇）.
2.An unforgettable experience
3． My entertainment
4． How can I save the earth
5． My favorite sport
6． How will spend this summer vacation
7． What are the ways to relieve pressure
8． As a youth,how can I help the 921 victims

The supergirls in my eyes
(我眼中的超级女声)

Harmonious Society
Socialist new rural area

The real reason of soaring gas prices