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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根据短文内容，从各题所给的A、B、C、D四个选项中选出最佳选项。

　　Lisa has always been overweight．She wanted to lose weight, not just because she wanted to 　　1　　 more beautiful and he healthier, but also because it would make life easier．For example, it was 　　2　　 for Lisa to find ready－made clothes that would fit．She had to ask a tailor(裁缝) 　　3　　 clothes that were large enough．In school, she needed a special chair 　　4　　 was bigger and stronger than the other chairs．If she went for a walk, she got tired very quickly．She was also unhappy about the way people treated 　　5　　 sometimes．“People look at me and even make fun of me．That's unfair! It's true that I'm overweight, but I don't think people 　　6　　 treat me differently because I'm big．I can't enjoy 　　7　　 with my friends because I'm afraid of getting fatter．” Her friends and family never made fun of her．They tried to help her 　　8　　．They wanted her to be happy and healthy．Sometimes when Lisa was feeling sad, she didn't want to speak to 　　9　　．

　　But now things 　　10　　 quite different．Last month her classmates were preparing for the School 　　11　　 Week．Someone advised Lisa to play the lead role of the proud Queen(女王)who was tall and fat．Lisa 　　12　　 and practiced a lot．

　　Soon after the play, Lisa became the star! She did 　　13　　 well that everybody remembered the proud Queen．They stood around her and said “　　14　　” to her．She even won the School Best Actress Award for her wonderful performance．

Now Lisa doesn't worry 　　15　　 being fat any more．She believes in the English saying “Every dog has its day．”

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阅读理解，阅读下面短文，从各题所给的A、B、C、D四个选项中，选出最佳选项。

　　A study finds that not enough morning light causes teenagers not to get enough sleep at night．“As teenagers spend more time indoors, they miss necessary morning light．Day light is needed to keep the balance of the body's 24-hour biological system(生物系统), which regulates(调节)body temperature and sleep styles, ” reports Dr．Mariana Figueiro．“These teenagers who receive little morning light are going to bed later, getting less sleep and doing badly in tests．They are more likely to fail in their exams．”

　　In the study, Dr．Figueiro asked 11 students in Grade 8 to wear special glasses to prevent blue morning light from reaching their eyes．At the end of the 5-day study she found that they fell asleep 30 minutes later than usual．

　　Throughout her research, Dr．Figueiro has been very worried about teenagers going to bed too late．The problem is that today's schools require teenagers to be in school very early in the morning．These students are likely to miss the morning light because they often go to school before the sun is up or as it's just rising．

　　Furthermore(此外), the schools are not likely to provide enough electric light to keep the balance of this biological system．Our biological system is much more sensitive(敏感的)to blue light．Therefore, having lots of light in the classroom does not make sure that there is enough light to keep our biological system balanced．

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