Tim Berners-Lee is not the most famous inventor in the world．However，his invention has changed our lives．

    He was born in London，England in 1955．When he was a small boy，Tim was interested in playing with electrical things．He studied science at Oxford University．He made his first computer from an old television at the age of 21．

    Tim started working on early computers．At that time，they were much bigger than now．He worked in England then Switzerland．Tim was really interested in two things，computers and how the brain works．How could the brain connect so many facts so quickly？He had to work with people all over the world．They shared information about computers．It was hard to manage all the information．He answered the same questions again and again．took a lot of time．It was even difficult for computers in the same office in Switzerland to share information．Tim also forgot things easily．Could a computer work like a brain？Could it"talk"to other computers？

    There was an Internet already but it was difficult to use．In 1989，Tim Berners﹣Lee invented the World Wide Web（WWW） all by himself．This had a special language that helped computers talk to each other on the Internet．When people wanted to share information with others，they used the World Wide Web．The Internet grew quickly after that．

    Tim Berners﹣Lee doesn't think he did anything special．He says that all of the ideas about the Internet were already there．All he did was to put them together．He says that many other people worked together to make the Internet what it is today．

    Most inventors want to become rich．But Tim gave away the World Wide Web for nothing．He now works in America．He helps people share technology and wants the Internet to be free for everyone to use．Maybe he is the most important but least famous inventor in the world today!

    In Los Angeles, a waiter served a group of teens. The waiter remembered his experience as a young high school student. So he made sure the teens had a pleasant experience at the restaurant. The waiter made sure of it.

    After serving all the teens doing a great job, he was left a tip, only $3.28. That was hardly enough to buy a drink at Starbucks.

    The waiter went home. And he felt hatred for the students who did not know the value of hard work. They looked down on people like him. Or so he thought.

    After several days, the waiter forgot about it. His life went on as usual. But ten days later, he received a letter from the teens.

    "About a week and a half ago, on October 7, my three friends and I came to eat at this restaurant as our own homecoming celebration. It was an exciting experience for us to be here alone, and it was all new to us. And you were the best waiter we could ask for. You were kind, helpful, and didn't treat us like babies! So I want to say thank you for making our 'grown-up' experience so amazing and fun.

    "I would also like to say sorry on behalf of my group. Since we were new to all of this, our 13-year-old minds didn't exactly know how to deal with the bill. The bill was reasonable, but we had completely forgotten (and didn't know, to be honest) what a tip even was, let alone how much to give. So we emptied our pockets, and all our money added up to $3.28.

    "Having no idea of how small this really was, we left. Later, we realized our mistake and felt terrible. We knew we had to make it right.

    "So together with this letter, you will find the correct 18% tip + extra for simply being amazing. Thank you for your help and patience and also thank you for making our night fun. Thank you!"

    On a Friday night, a poor young violinist was playing his violin at the entrance(入口) of the subway station. He played such great music that people slowed down to listen and put some money into his hat.

    The next day, the violinist came to the entrance again. He put down his hat as usual. Beside the hat was a piece of paper with some words on it. It said, "A George Black has put an important thing into my hat by mistake. Welcome to claim(认领）it." Soon the people were all interested in the words and wondered what it could be. After a while, a man rushed into the crowd, took the violinist's shoulders and said, "I knew you would certainly come." The violinist asked, "Did you lose anything?" "Lottery(彩票)." The violinist took out a lottery ticket with Black's name on it.

    Black took it and danced happily.

    Black was an office worker. He bought the lottery and won a prize of $500000.But when he gave $50 to the violinist for his wonderful music, the lottery ticket was thrown in, too. The violinist was a college student.  That morning he was going to fly to Vienna for high education. However, when he found the ticket, he put off the flight and went back to the entrance.

    Later someone asked the violinist why he didn't take the lottery ticket to pay for his high education. He said, "Although I don't have much money, I live a happy life. If I lose honesty, I won't be happy forever."

    "The hound(猎犬)!" cries Holmes. "Come, Watson! Come."

    We run quickly over the moor(荒野). We hear one last cry. A man is lying on the ground. As we approach(靠近) we see the dead body of Sir Henry Baskerville. He is wearing his brown suit.

    "Oh, no!" says Holmes, "This man has a beard!"

    Indeed Selden is dead instead of Sir Henry.

    "So it is all clear to me. I remember that Sir Henry gave his old suit to Barrymore, and Barrymore probably gave it to Selden—his wife's brother."

    "Then Selden is dead because of this suit," says Holmes.

    "Think, Watson! Someone gives the hound some of Sir Henry's clothes—probably the boot from the hotel in London. The hound picks up Sir Henry's scent and runs after this poor man."

    Suddenly we see Stapleton walking towards us. He says, "There was a strange noise. I was worried about Sir Henry. I wanted to check if he was all right."

    "Really?" asks Holmes.

    Stapleton looks at Holmes. "Why, it is Mr. Sherlock Holmes, the famous detective! Can you solve the mystery of the Hound of the Baskervilles?"

    Holmes shrugs his shoulders," We cannot solve every mystery. Anyway I will return to London tomorrow."

    "Oh, will you return to London tomorrow?"

    "Yes."

    So Holmes and I walk off to Baskerville Hall and Stapleton walk to his home.

    Holmes thinks Stapleton is dangerous. But we have no proof that Stapleton is the murderer.

    "There are no marks on Sir Charles's body. We know that he died of fright, but we can't prove anything."

    "Things are becoming clear to me," Holmes says to Sir Henry. "It's a very difficult case. And you must help me to catch this hound."

    We are surprised to see one portrait(画像) of a thin man is Sir Hugo, the first victim of the Hound of the Baskervilles. And he's like both Sir Henry and Stapleton. "Stapleton is a Baskerville," replies Holmes. "So he wants to inherit(继承) the Baskerville fortune, and he…," I say. It's an important clue.