根据短文内容，从每小题A、B、C三个选项中选出一个最佳答案。

　　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 images(影像)from the screen look like they are there in the room with you．

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

　　When we view media such as pictures and television in two dimensions, each eye gets the same information．That is because the image has no real depth, and there is only one way of viewing it．

　　So the goal of 3-D technology is to get a different image into each eye of the viewer．It uses two film projectors(投射器)．One projects a left eye image and the other projects a right eye image．The 3-D glasses allow us to see a different image in each eye．

　　While watching 3-D films, we feel that we are actually in the same environment as the things we’re watching．However, it also has its disadvantages．The 3-D glasses make the screen look darker．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 images．

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阅读理解

阅读下列短文，从每小题A、B、C、D四个选项中选出一个最佳答案。

We can find ads(广告) everywhere．Here are four ads．Please read them carefully．

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阅读理解

阅读下列短文，从每小题A、B、C、D四个选项中选出一个最佳答案。

　　Dick wanted to buy some new clothes, so he went to a shop．First he asked for some trousers and put them on, but then he took them off and gave them back to the shopkeeper and said, " No, give me a coat．"

　　The man gave him a coat and said, " This one costs the same as the trousers．" Dick took the coat and walked out of the shop with it．The shopkeeper ran after him and said, " You didn't pay for that coat !"

　　" But I gave you the trousers for the coat," said Dick．" They cost the same as the coat, didn't they ?"

　　" Yes," said the shopkeeper, "But you didn't pay for the trousers either．"

　　" Of course I didn't ," answered Dick , " I didn't take them．I'm not a fool(傻瓜 )．Nobody gives things back and then pays for them．"

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阅读理解

阅读下列短文，从每小题A、B、C、D四个选项中选出一个最佳答案。

　　Today people can use the phone to talk with others almost anywhere on the earth．But when you use the phone, you don't see the person you are talking with．This may change in the near future．

　　Today some people are using a kind of telephone called the picture phone．With it, two people who are talking can see each other．

　　Picture phones can be useful when you have something to show to the person you' re calling．They may have other uses in the future．One day you may be able to ring up a library and ask to see a book．Then you'll be able to read the book right over your picture phone．Or you may be able to go shopping through your picture phone．If you see something in the newspaper that you think you want to buy, you'll go to your phone and call the shop．People at the shop will show you the thing you're interested in right over the phone．You'll be able to shop all over town and never even leave your room!

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