When I was a junior high school student in 1980, God gave me a gift, it was happiness.

 One weekend, I went to visit my grandparents in the countryside. On my way home a car ran over me and cut off my  1  because of its high speed.

 Several days later when I woke up at the hospital, I realized I had to spend the rest of my life ­ 2  arms. How sad I felt at that time! Even I was full of fears. 3  slowly I knew I had to face the fact and got over it. I couldn't get my arms back even though I 4every day.

However, it's easier 5 than done. It took me nearly half a year to get out of the sadness 6 . I got so much from my past story. From then on, I could treat my life with a 7 mind. But in our daily life, I often see my classmates 8 about little things: They get a bad grade on a test; their bus comes9; they don't have a mobile phone but 10 have, and so on. But I only 11 life. I was lucky to realize from an accident : It is a waste of our life to focus on what you have 12 . We should always think of what we have. So why are so many people unhappy? Someone may say, “My whole life would improve 13 I have a new car.” But when you get the car and what 14 ? For a whole week you are walking on air. Then you go right back to being unhappy.

Happiness depends on what we have! It's in our heart. It's a state of mind, even though you own the whole world, you may still feel15 .Happiness comes from mastering the art of appreciating(感激) and taking pleasure in what you really have.

Leonardo da Vinci was born on April 15, 1452 in Italy. He is best known as an artist today. One of his famous paintings is called Mona Lisa. However, Leonardo had many other natural abilities. He was also a great inventor. Many of his inventions have become important in modern day life.

Although Leonardo hated war, he invented many different machines used for war. His most special invention was the machine gun, which was produced and used in war many years later.

      By watching the way birds fly, Leonardo tried to find out the secret of flying. Among his sketches(素描)we can see several objects. We consider them as modern flying machines.

      Leonardo spent many hours thinking about how to make good use of time. He developed ideas for labor-saving machines like cutting machines.

Leonardo was a strange man. He didn't eat any meat, which was very unusual in those times. He never published (发表) his ideas and scientific discoveries. He usually used mirror writing, which looks like writing in a mirror, starting from the right side of the page and moving to the left.

      We have very little of his work today. Leonardo finished only a few of his paintings. He left many unfinished because he thought they were not perfect. No one in his life time knew how great Leonardo was. We now believe, however, that he was one of the cleverest men the world has ever known.

    You have probably heard the expression, "It's raining cats and dogs outside." It means that it's raining very hard but not that 1 cats and dogs are filling from the sky. 2, one day in June, 1882, it really did rain 3 over Dubuque, Iowa. The frogs began falling along with hailstones (冰雹) during a 4 storm.

    Hail is 5 when drops of rainwater are caught by heavy winds and are carried high up into the air. There the raindrops become 6. Many drops may freeze together to form 7 of ice; these ice balls, or hailstones, then 8 to earth.

    During the storm in Dubuque, the strong winds 9 small frogs from nearby ponds into the air along with raindrops. When some of these frogs became covered 10 ice, both hailstones and "frog-stones" fell onto the ground.