开头：Good morning everybody!It's my honor to speak here,and I am very glad to share my topic with you.Then today I'd like to talk something about.（大家早上好!能在这里做此次演讲我十分荣幸,也很高兴能跟大家一起分享我的主题,今天我想演讲的是.）
结尾：OK,thank you for listening,that's all.（好了,谢谢各位的聆听,我的演讲结束了.）我参加过很多英语比赛,而这个是比较常用的,也能体现出你的修养,可以试试看哦～Come on!