急需一篇英语演讲稿 关于世界最伟大的发明

给你写个开头吧，以后要自己想，瞎编就行了呗，又不难
The Big World
This is a big world at all.And This is a bad world,I guess.During my first five years I had heard a lot of story about some great inventions(高手一般不会写单词的，懂吗）。Most of them have been thrown away at the bottom of the occean.But there is one ,just one that I can not delet from my memory. That is SEX(当然这里你可以换成你喜欢的大发明，电灯电话，造纸，推荐使用radio手淫机,可以达到令人吃惊的效果，一般人不会想到收音机，尤其是目前全国SB那么多，一般都选汽车，飞机，四大发明这些个俗的，选收银机，出奇制胜，听我的）。（下面用歌词来打动大家，个词选自Yesterday Once more, 大家都熟，容易引起共鸣效果）When I was yong ,I listened to the radio。你再补充吧