C

　　Fashions have a lot of rules. Most of them, however, are just wrong. But there's one rule that goes beyond tradition and into the field of scientific study of the brain: Black garments are slimming. It all comes down to how your visual system processes the light. The below holes in each square are the same in size, yet the white hole looks bigger than the black hole.

　　In the 1500s, Galileo Galilei noticed that some of the planets looked larger when viewed with the naked eye (肉眼) than they did when viewed through a telescope, making the white light of Venus (金星) appear eight to ten times larger than Jupiter (木星) in the night sky. He knew something strange must be going on with his vision to cause this illusion, but he wasn't sure what it was. Luckily, scientists never stopped wondering, and in 2014, they figured it out.

　　Our visual system operates via two main channels: "on" neurons (神经元) that are sensitive to light things and "off" neurons that are sensitive to dark things. When it came to the dark "off" neurons, the researchers found that they responded predictably to dark shapes on a light background - the greater the contrast between the two, the more active these neurons were. But the light "on" neurons behaved unpredictably. Even with the same amount of contrast, light objects on a dark background caused a greater response in these neurons.

　　This makes some sense, evolutionarily speaking. In the dark of night, you'd want to be able to take in every bit of light you can get, so a visual system that enlarges light objects on a dark background could be very useful. However, it's not that hard to see dark objects in the light of day. It has some effects in the colors of your clothes and in the appearance of the planets - the brighter appearance of Venus in the night sky makes it look bigger than the darker Jupiter.

28. What did Galileo Galilei believe according to Paragraph 2?

　A. The neurons led to the difference.

　B. There was something wrong with his telescope.

　C. The difference was caused by his visual illusion.

　D. Things were bigger when seen through telescopes.

29. What do we know about the "off" neurons?

　A. They are sensitive to light objects.

　B. Their behavior can't be predicted.

　C. They behave differently from person to person.

　D. Their activeness improves with the contrast of colors.

30. What does the author think of the phenomenon?

　A. It makes people feel puzzled. B. It brings great harm to people. 　C. It is more common among youths. D. It is beneficial to people's evolution. 31. What is the text mainly about?

　A. Why we look thinner when in black.

　B. What visual illusions bring to people.

　C. How we are affected by the fashion rules.

　D. Whether people's visual system is different.

　　"No matter where you are or what time it is there's something going on at a Hard Rock Cafe. All over the world our cafes not only serve great food, but they serve up great music." Hard Rock Cafes around the world symbolize the timeless energy, originality and unifying (团结的) spirit that have helped to shape rock music over the last century.

　　Founded by two Americans, the first Hard Rock Cafe (HRC) opened its doors to the public on June 14, 1971, in London. Today, HRC has become a global phenomenon with more than 180 cafes in different countries.

　　HRC has also become the world's leading collector and exhibitor of rock 'n' roll memorabilia. It all started when Eric Clapton, a regular at the first HRC, asked the staff if they could hang his guitar on the wall to mark his favourite stool (凳子) as "his spot". They did and one week later, a package from Pete Townshend arrived with a guitar and a note with the message, "Mine's as good as his! Love, Pete."

　　Ever since then, Hard Rock Cafes have been collecting pieces of rock memorabilia and covering their walls with them. Their collection is rotated from restaurant to restaurant and provides the world's most comprehensive "visual history" of rock 'n' roll. These treasures include an awe-inspiring collection of classic guitars and other instruments, posters, music, etc.

　　Throughout its history, HRC has been governed by a special service philosophy: "Love All - Serve All." Since it was established, HRC has taken part in a wide variety of humane activities around the world. Following its idea of being more than just a restaurant, HRC tries to connect its business and its passion to make the earth a safer, healthier and better place to live.

　　All in all, Hard Rock Cafe International is an entertainment company that continues to successfully expand the Hard Rock brand through countless music-related activities.

32. What is the purpose of the first paragraph?

　A. To explain why HRC is a success.

　B. To show the characteristics of HRC.

　C. To describe the excellent service of HRC.

D. To introduce what you can share in a HRC.