The Greatest Invention In My EyesGood evening, ladies and gentlemen. Last night in my room, busy preparing for my speech today, I was puzzled at the opinions of greatest inventions of different persons. I read many books. Some articles hold the opinions that the greatest invention in the world is electricity, while the others believe computers cannot be replaced in the modern society. I read and read, suddenly an idea struck me: The greatest invention are just books. A famous person has ever said: "Books are the best teachers." Exactly! That's what I would like to say firstly. In the long history of human being, books have played an important part in communicating knowledge. And even today, the situation is still so. Each year, millions of books are published in the world. Knowledge changes our lives. If a learned person wants to express some new idea, probably he will choose to write a book. On the other hand, the best way to broaden our horizons is reading books.Secondly, as I have been puzzled, books provide you with different ideas. And you make your decision to choose anyone that fit you. Or otherwise, you may choose none of them, just like I, instead of obeying books' advise. I choose "books" as the greatest invention in my eyes. So, don't you think it's a little interesting? Books are honored as teachers without sound. But how are books different from our real teachers? I think the fact is that if a real teacher advices me to choose electricity or computer as my topic today, and every one you can imagine, how much brave I will prepare to refuse. So don't you think books are better tempered and better get along with than our real teachers? That's all, thank you.