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!

    Life is full of surprises and you never know how things will turn out.

    Sir John Gurdon is a good example of this. As a boy, he was told he was hopeless at science and was at bottom of his class. Now, aged 79，the very same Gurdon shared the 2012 Nobel Prize in Medicine with Japanese stem cell (干细胞) researcher Shinya Yamanaka.

    Like so many scientists, Gurdon shows us where the power of curiosity and perseverance(坚持) can lead.

    When he was 15 in 1948，Gurdon ranked last out of the 250 boys at his high school in biology and every other science subject. Gurdon's high school science teacher even said that his dream of becoming a scientist was "quite ridiculous".

In spite of his teacher's criticisms(批评), Gurdon followed his curiosity and kept working hard. He went to the lab early and left later than anyone else. He experienced thousands of failures.

     "My own belief is that we will, in the end，understand everything about how cells actually work，"Gurdon said.

    In 1962, Gurdon took a cell from an adult frog and moved its genetic (基因的) information into an egg cell. The egg cell then grew into a clone of the adult frog. This technique later helped to create the sheep Dolly in 1996，the first cloned mammal(哺乳动物) in the world.In 2006，Gurdon's work was developed by Yamanaka to show that a sample(样本) of a person's skin can be used to create stem cells. Using this technique, doctors can repair a patient's heart after a heart attack."Luck favors the prepared mind," Gurdon told the Nobel Prize Organization. "Ninety percent of the time things don't work, but when they do, you have to seize(抓住) the chance.

    In January, 2017, a Chinese "diplomat(外交官)" came back to China from the United States. Many US people were at the airport and said goodbye to her. Who is the diplomat? She is a 3-year-old panda called Bao Bao.

    Bao Bao was born at the National Zoo in Washington D. C., the US in 2013. Her parents are Tian Tian and Mei Xiang. China sent them to the US in 2000."We have watched Bao Bao grow up during the past three years," said Dennis Kelly, the zoo director. "We're going to miss her so much."

    Why does Bao Bao have to come back to China? It's because all the pandas born in foreign countries must come back to China before they turn 4. This is an agreement between China and other countries.

    Bao Bao spent about 16 hours on the plane home. A zookeeper and a doctor stayed with her along the way. The zoo also put bamboo, apples, biscuits, potatoes and water on the plane. Now, Bao Bao is happy at her new home in Chengdu, Sichuan Province.

    I look at Grandma, and I don't know what to do.

    "Go! Go! But come back with some wood and some fruit," she says.

    "Ok!" I say, and I run out of the door and down the street out of the town. I follow an old track and it leads me towards the hills. Suddenly I see the nursery in front of me. It is like a sea of green. There are all kinds of trees and a very big vegetable garden. I step inside the gate. It is quiet here, safe from the wind and it smells so good.

    John, David and James were three brothers. Every year on their mother's birthday, they sent her expensive presents. They liked to show her how rich they were.

    The oldest brother , John, decided to give his mother a perfect(完 美的) present. He thought it must be more expensive than his brothers'.

    So he put an advertisement(广告) in the newspapers: WANTED THE PERFECT PRESENT FOR A RICH WOMAN. For many days people phoned him from all over the country. Each of them wanted to sell him" the perfect present". But John didn't like any of them.

    Then, less than a week before his mother's birthday, a man came to his office. He was carrying a cage with a large bird in it. "This bird," the man said," can speak ten languages (语言) and sing any popular songs. There's no other bird like it in the world." With these words, he asked the bird to speak to John in French, tell him a joke in Japanese and sing a famous popular song. John was very happy.

    "I'll buy it. How much do you want?" John said." One hundred thousand dollars," the man said. This was a lot of money, but John paid him. Then he sent the bird to his mother with a birthday card.

    The day after his mother's birthday he phoned her." Well, Mother," he asked," what do you think of the bird?" "Oh, very delicious, dear," she answered.