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 are 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 make 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 the 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 *projectors. 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 reasons is the 3-D glasses makes 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.Paragraph 3 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-D films or TV

2.When we watch a 2-D film, each of our eyes get ________ information.

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

3.Which is the following is right according to the passage?

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

B．The 3-D technology is based 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-D films? 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

One day, my English teacher asked me to help her save back-up（备份） copies of her work in the computer. I then realized I was able to know the grades of all of her students. I   36  her how to copy files（文件） from one disk to another and she thanked me.
A few days later, she asked me to help her again, because she   37  how to do it. When I showed it to her, some students in my class  38  and began to talk among themselves   39 .Later that day, at lunch time, several of them came up to me.
“Hey, could you help us change our grades? We’ll   40  for it.”
I could not believe what I heard. I could get paid for something very  41 . “All right. I’ll do it.” The next day, my English teacher   42  me to help him out again. When he was not paying   43   , I changed their grades from Fs to As.
I soon became very   44  among my friends. They began to treat me like God who could do  45 . Word spread quickly and I became very rich.
Everything was going fine  46 I was called into the headmaster’s office. When I got there, both of my teacher and the headmaster were very angry. “ I don’t want to  47  what your teacher said, but I have to. She has too much evidence(证据),’’ the headmaster said. “Do you have anything to say for yourself?”
“No,” I said finally. I didn’t realize how   48  my behavior had been. I had disappointed my teacher and the headmaster. And there was no way  49  . I had to leave my school. That was a good  50  for me.

One day, my English teacher asked me to help her save back-up（备份） copies of her work in the computer. I then realized I was able to know the grades of all of her students. I   1  her how to copy files（文件） from one disk to another and she thanked me.
A few days later, she asked me to help her again, because she   2  how to do it. When I showed it to her, some students in my class   3  and began to talk among themselves   4  .Later that day, at lunch time, several of them came up to me.
“Hey, could you help us change our grades? We’ll   5  for it.”
I could not believe what I heard. I could get paid for something very   6 . “All right. I’ll do it.” The next day, my English teacher   7  me to help him out again. When he was not paying   8  , I changed their grades from Fs to As.
I soon became very   9  among my friends. They began to treat me like God who could do   10 . Word spread quickly and I became very rich.
Everything was going fine   11  I was called into the headmaster’s office. When I got there, both of my teacher and the headmaster were very angry. “ I don’t want to   12  what your teacher said, but I have to. She has too much evidence(证据),’’ the headmaster said. “Do you have anything to say for yourself?”
“No,” I said finally. I didn’t realize how   13  my behavior had been. I had disappointed my teacher and the headmaster. And there was no way   14 . I had to leave my school. That was a good   15  for me.