One morning, a little mouse went out to find something to eat. He was careless and met a fierce (凶猛的) lion. The lion caught the mouse and wanted to eat him.

    "Please let me go, Mr. lion, "said the mouse." One day, I'll help you. "

    The lion laughed, "How could a little mouse help a big lion?" "Well," he said. "I will let you go. But you must walk more carefully. "

    The mouse was very grateful (感激的). "Thank you, Mr. Lion. You are very kind. I will repay (报答) you one day, " the little mouse said.

    The next week, the mouse was looking for something to eat again. He saw the lion under a tree. But the lion was tied tightly (紧紧地被捆着) in a net of strong ropes (绳子) .He could not get out.

    "I will help you, "said the mouse .His teeth were sharp. Then he bit (咬) one rope, and then another. Soon the lion was free. He was very pleased. "Thank you, Mr. Mouse,” he said.

    Have you ever ridden a Ferris wheel lately? Can you imagine the flying feeling as you are pulled up to the top and then moved down to the bottom quickly again?

    Today a Ferris wheel is usually 40 to 60 feet tall. That seems very high when you are on the top looking down. But the first Ferris wheel was 264 feet high- taller than a twenty-story building! Can you imagine the view from the top of that?

    The first Ferris wheel was built for the 1893 World's Fair in Chicago. The people who planned the fair were looking for an attraction that would bring people to Chicago. George Ferris handed a drawing of a giant wheel that people could ride on. At first everyone laughed at his strange idea. But Mr Ferris did not give up, and finally the idea was accepted. The ride opened in June of 1893.

    Today's Ferris wheels have 12 to 16 seats, which each carry 2 or 3 people. But that first one had 36 enclosed cars, each holding 60 passengers. When filled, it carried 2,160 people. During that summer in Chicago, about 1.5 million people rode the Ferris wheel.

After the fair, the ride was moved to a nearby amusement park built especially to show off the wheel. In 1904, it was moved again一to St. Louis for the Louisiana Purchase Exposition. After the fair there, the wheel stood unused. In 1906, it was finally sold to a company for scrap metal(废金属).

    Luckily a Chicago bridge builder, W.E. Sullivan, figured out how to make a smaller Ferris wheel that could easily be taken apart and put together. In 1906, he started the company that still makes many of the Ferris wheels used today.

    But, whenever you ride one, remember that it all began with George Ferris's strange idea!

Babies don't learn to talk just from hearing sounds. They are lip (嘴唇) readers too. It happens during the period when a baby's babbling (咿呀声) slowly changes from unclear voices into that first "mama" or "dada". The babies have to find out how to shape their lips to make the sounds they are hearing, according to developmental psychologist David Lewkowicz of Florida Atlantic University, who led the study.

Clearly it doesn't take them too long to understand the movements that match basic sounds. By their first birthdays, babies start changing back to look you in the eye again. It offers more clues that quality face-time with babies is very important for speech development more than, say, turning on the latest baby DVD. 

But Lewkowicz went a step further. He and his student Amy Hansen Tift tested nearly 180 babies, groups of them at ages 4, 6, 8, 10 and 12 months. How? They showed videos of a woman speaking in English or French to babies of English speakers. They found that when the speaker used English, the 4-month-old babies gazed (凝视) mostly into her eyes. The 6-month-old babies spent equal amounts (数量) of time looking at the eyes and the mouth. The 8-month-old babies and 10-month-old babies studied mostly the mouth. At 12 months, attention started changing back toward the speaker's eyes.

But what happened when these babies are used to English heard French? The 12-month-old babies studied the mouth longer, just like younger babies. They needed the extra information to understand the new sounds. That fits with research into bilingualism (双语) that shows babies' brains adjust (调整) themselves to tell the differences between the sounds of their first language over other languages in the first year of life.

The continued lip reading shows the l-year-old babies clearly still are fit for learning. Babies are so hard to study, says Duke University cognitive scientist Greg Appelbaum, who found the research so fantastic that he wants to know more.

Healthy habits mean healthy eyes. Here are some ways to keep eyes healthy. 

*Clean your eyes with pure cold water regularly(定期的). This is one of the best ways to keep eyes healthy and illness free. 

* Avoid looking directly at the sun. 

*Roll your eyes up and down, then side to side. Exercise five times every day to relax your eyes.

* Keep a good distance(距离) from the computer screen-sit about 22-28 inches away from it and have a rest every half an hour. 

*Visit your eye doctor on a regular basis. 

There are also some tips for healthy contact lens wear and care to help prevent eye infections. Please Visit CDC's healthy contacness website(www. cdc. gov/contactlenses) and you can also follow them on social media. 

Hip-hop dancing（街舞）is popular with many young people today. They like it because they can invent their own moves. They use this dance to show their love for life. It also shows that they feel good about life, that they just want to be themselves and enjoy life, and that they are not afraid of problems. 

Hip-hop dancing has a history of more than 30 years. It first began in the 1980s in the USA. In early times, it was seen in New York and Los Angeles. At that time, many young black people often danced to the music in the streets. They used their legs, arms, heads and even shoulders to dance. Many young people still use most of these moves today. 

Hip-hop dancing became popular all over the world because of the 1983 movie Flashdance. Some people performed Hip-hop dancing in the movie. People enjoyed their performance. They began to dance like them. Then it became popular. There are two kinds of Hip-hop dancing: new school and old school. More and more young people are learning Hip-hop dancing. People believe that it is a good way to exercise their bodies, and that it is good for their health .