【文章內(nèi)容簡介】 ttery (電池 ) and passed it through a straw ( 吸管 ) placed in a cup of sweet lemonade. Volunteers reported that the lemonade tasted not as sweet as it usually was, because the electricity created the taste of salt. Nakamura has improved the technology to be able to make the electricity reach the food through forks and chopsticks. “The metallic part of the fork is one electrode (電極 ), and the handle is the other,” Nakamura explained. “When you take a piece of food with the fork and put it in your mouth, you connect the circuit. When you take the fork out of your mouth, you disconnect the circuit. So it actually works as a switch.” Simon Klose, TV presenter of food program Munchies, who recently visited Nakamura to try out the fork himself, then said it was one of the greatest eating experiences he’d ever had. “When I first heard of electric food, it sounded terrible.” he said. He later continued to use the fork to eat pieces of fried chicken, and found that the saltiness greatly increased as the electricity was connected. Nakamura has been eating “electric” food for the past three to four years in order to understand it better. “For me,” she said, “it may seem like we’re cooking but we’re actually working on the human taste.” 38. The electric fork may be good for people who ▲ . A. need to lose weight B. work as researchers C. show interest in physics D. have high blood pressure 39. Paragraph 4 mainly tells us ▲ . A. what creates the taste of salt B. how the electric fork works C. where the electric fork was invented D. when the technology was known to public 40. What can we learn from the passage? A. The electric fork can create unreal taste. B. A researcher from the USA invented the electric fork. C. People can use the electric fork by pushing the switch. D. The idea of adding electricity to food was first shown in a TV program. 41. Which of the following would be the best title for this passage? A. A Famous Researcher. B. An Interesting Experiment. C. A New Invention. D. A Great Eating Experience. D You need some bread and milk. But half an hour later, you leave the supermarket with a trolley (手推車 ) full of food. What games do supermarkets play to make us spend so much money? The tricks usually start before you walk in. Outside the supermarket door, anybody who walks past can smell warm, fresh bread. That makes us hungry and ready to buy lots of food, not just bread. Now you’re inside and, of course, a small basket would be fine, but in some supermarkets, all they have are trolleys. And of course the problem with a trolley is that it looks sad and lonely with just one or two products inside. So we may fill it with something. In fact, supermarket trolleys are actually getting bigger so that we buy more. Of course, many people shop in supermarkets because they think everything is cheaper than in other shops. So supermarkets offer very cheap prices on some things but then have higher prices for other products. One new trick is to put red stickers (標簽 ) on products. Customers usually connect red stickers with lower prices so the red stickers are easy to be noticed, even when there is no reduction (降價 )! Interestingly, this trick appears to work more with men than with women. There is a story behind the position of everything in the supermarket. For example, customers often go only to buy milk. So they put it right at the back, forcing you to go past hundreds of shelves full of other products. The position of products on each shelf is also important. The most expensive products are usually at eyelevel so you see these at once. The exception is anything that children might like. These products are on lower shelves so that kids see and even reach them. Except what you see and smell in a supermarket, how about what you listen to? In most supermarkets they have soft, slow music. It’s so relaxing that you slow down and spend more time (and money) in the store. You also move more slowly when the supermarket is busy. Experts suggest it’s better to shop when it’s quieter, on a Monday or a Tuesday for example. And be careful at the checkouts when you pay for the things you buy. These are sometimes on purpose, to make you buy something from the checkout shelves while you wait for your turn. So, next time you go into your local supermarket, remember these tricks and see if you can e out with just the things you want. 42. Many supermarkets put red stickers on products to ▲ . A. make them look more beautiful B. make them different from cheaper ones C. make people think the stickers are for men D. make people think they could save money 43. According to the passage, toys for children are usually placed ▲ . A. on the lower shelves B. on the back shelves C. on the front shelves D. on the higher shelves 44. What is the passage mainly about? A. Several rules that every business should follow. B. Several ways supermarkets use to sell more products. C. Some advertisements tha