求英语演讲比赛主持词的开头语和结束语。

A: Good afternoon, ladies and gentlemen ！ welcome to the English Speech Competition in…… We are very happy to gather here hold an English afternoon party. I am happy to stand here and have this opportunity to share something with you guys.
B: 尊敬的各位领导，各位来宾，亲爱的同学们，大家中午好（合）！欢迎来到……英语朗诵比赛的现场。比赛正式开始。
A: first of all ，let me introduce our distinguished guests afternoon today .Mr. …(and so on)
B: 首先 ，让我来给大家介绍一下今天来的评委及其嘉宾。姓名……
……
让我们再次以热烈的掌声欢迎各位老师的到来！
A: welcome.
A: There are all together 15 contestants to compete in today’s English Speech Competition.
B: 今天有15位优秀的同学参加这次英语朗诵比赛。
A: now let me introduce the rules of this competition. There is 2 parts in today’s competition.1st is preparedSpeech, you will introduce yourself. And each of contests has 3 minutes to present prepared speech.