Mike and Dick work in the same office. They don't like the cold weather. And one day they decided 1 their holiday in Australia. Their plane 2 Sydney at nine in the morning. They had a good rest in a hotel. The next morning they 3 a car in the city and began their travel. A few hours later the sun 4 in the sky and there were no shade trees beside. It was so hot that they could hardly go on driving. They had to stop 5 around. Mike found a river was about half a kilometer away from them. They were both very happy and drove the car 6.

    there. Soon they got to the river. Before they jumped into the water, Dick saw a boy 7 under a big tree. He asked, "Are there any sharks in the river, boy?" "No, there aren't." answered the boy. So they began 8 in the river. After a while, Dick felt something hit 9 his leg. He told Mike about it. They were afraid and stopped swimming. Dick asked 10, "Is it true that there aren't any sharks in the river?"

    "Yes, sir," said the boy, "There're a lot of crocodiles(鳄鱼)in the water. All the sharks（鲨鱼） have swum away!"

    Who designed the first helicopter （直升飞机）？Who1 the most famous pictures in the world？Who knew more about the human body than most2？There is a（n）3 to all these questions﹣Leonardo de Vinci.

    Leonardo may have been the greatest genius4 have ever known.He lived in Italy around the year 1500，but many of his inventions seem 5 to us today.For example，one of his notebooks has drawings of a helicopter.Of course，he couldn't 6 a helicopter with the things he had at that time.But scientists say his idea would have worked.

    But Leonardo was not just an inventor.He was one of the 7 artists of his day.By the time he was twenty years old，he was called a master （大师） painter，and as he got older he became 8 more famous.

    Many of Leonardo's wonderful 9 are still with us today.You may know one of his most famous works，the10 woman-Mona Lisa.

    Katy Sullivan is an actress, an athlete (运动员), and a person who also refuses to accept the words no or I can't.

    She was born without the lower half of her 1 and has worn prosthetic (假体) ones all her life. She grew up in Alabama, US and had a(n) 2 childhood. She kept up with her sisters and brothers at the gym and the swimming pool. She feels lucky 3 her family treated her in just the same way as the other members.

    When a person is born without legs, there are plenty of things that are 4 to do. But Katy believed she could 5 anything. So she chose two jobs that are difficult, 6 with both legs. As a teenager, she once saw a good movie. Before it was 7, Katy had made her mind up to be a(n) 8.

    She did a degree in theater and then moved to Los Angeles, where she has played 9 in theater, television and movies. She has a positive (积极的) view of life. She thinks that if you believe 10 can do something, you should 11 it. So when Katy's friend asked her 12 she'd like to try running, she said "yes". She was given a pair of running legs and she 13 her new life.

    Katy was the first person in the world with two prosthetic legs to 14 running as a competitive sport. She entered the final of the 100 meters in the 2012 London Paralympics.

    Katy's family, friends, and fans look up to her as an 15 of someone who has overcome her difficulty and achieved her dreams.