The London Olympic Games are coming soon. This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.

When you watch 3-D movies or TV, you have to wear a special pair of glasses. The 3-D glasses make the people and the things on the screen look like they are in the room with you.

3-D, means having three dimensions*: width*, height and depth*. 3-D technology is based on the way the human brain and eye work. Because the pupils of a person’s eyes about 6.5cm apart, when we look at something, each eye sees it from different angle*. Our eyes send the two pictures to our brain, and the brain puts them together. The small difference between the picture from the right eye and the picture from the left eye makes us see depth.

While watching 2-D films, we don’t have to wear the special glasses. We see the pictures in two dimensions, each eye get same information. This is because there is only one way of watching it.

So the aim of 3-D technology is to get a different picture into each eye of the person. It uses two film projects. One projects a left eye picture and the other projects a right eye picture. When we are in the cinema, we can see different pictures in each eye at the same time with the help of the 3-D glasses.

While watching 3-D films, we feel that we are actually in the same environment as the things we are watching. However, some people are against watching 3-D films. One of the reason is the 3-D glasses make the screen of the film or TV look darker. It is bad for eyes. What’s more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the pictures.

1.The third paragraph mainly tells us _____________.

A. how we see things in 3-D

B. how we watch the Olympic Games

C. how 3-D films are made

D. where we watch 3-Dfilms or TV

2.When we watch a 2-D film, each of our eyes gets ______ information.

A. no B. different C. dark D. the same

3.Which of the following is TRUE according to the passage?

A. We don’t have to wear 3-Dglasses if we watch games in 3-D on TV.

B. The 3-D technology is depended on the way the human ear and eye work.

C. All the people can have fun watching 3-D movies or TV for a long time.

D. 3-D glasses make us see different pictures in each eye at the same time.

4.Why are some people against watching 3-Dfilms? Because ________.

A.they make them more excited or sadder.

B.3-D glasses make the screen look darker.

C.3-D films make all people get headaches.

D.They dislike watching the Olympic Games.

What’s the most important thing for athletes (运动员) to win? Training hard? Having an excellent coach? Never giving up? Probably these are all very important, but according to a new book, the most important thing is getting enough sleep.

This book is Sleep to Win! by Dr. James Maas and Haley Davis. In this book, you can find out how getting more sleep helped fifteen-year-old Sarah Hughes win an Olympic gold medal. She said the biggest change she mad e in her training for the Olympics was getting more sleep. Sleep to Win! also gives examples of other professional athletes as well as student athletes becoming faster runners because of getting more sleep. For example, after Amber Way, a high school student in Michigan, changed her sleeping time from seven to over nine hours each night, her running speed increased a lot. She finally became the state champion (州冠军) after breaking five school records.

Dr. Haley Davis explained, “Why is sleeping so helpful? The reason is that teenagers whose bodies are still growing need to get about 9.25 hours of sleep each night. That’s about two hours more than most American teenagers are getting. Enough sleep helps the brain work properly. While teenagers are sleeping, their brains are preparing for the next day. A good night’s sleep can help them pay attention, make decisions and be creative.”

1.Who is an Olympic champion?

A. Dr. James Maas.

B. Dr. Haley Davis.

C. Sarah Hughes.

D. Amber Way.

2.We can read many stories of ______ in Sleep to Win!

A. young athletes

B. the authors

C. hard-working students

D. great coaches

3.In America, most teenagers are getting about ______ hours’ sleep each night.

A. 7 B. 7.25 C. 9 D. 9.25

4.What does the underlined word “properly” mean in Chinese?

A. 适当地 B. 永久地 C. 独立地 D. 不断地

5. What do the authors of Sleep to Win! probably think is the most important thing for young athletes to win?

A. Training hard.

B. Having a good coach.

C. Never giving up.

D. Getting enough sleep.

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