Supermarkets are trying out new computers that make shopping carts more intelligent (具备智能的). They will help shoppers find cups or toilet soap, and keep a record of the bill. The touch-screen devices (触摸屏装置) are on show at the Food Marketing Institute's exhibition here this week. 'These devices are able to create value and get you around the store quicker,' said Michael Alexandor, manager of Springboard Retail Networks Inc., which makes a smart cart computer called the Concierge. Canadian stores will test the Concierge in July. A similar device, IBM's 'shopping buddy,' has recently been test-marketed at Stop & Shop stores in Massachusetts. Neither device tells you how many fat grams or calories are in your cart, but they will flash you with items on sale. The idea is to make it easier for people to buy, not to have second thoughts that maybe you should put something back on the shelf. 'The whole model is driven by advertisers' need to get in front of shoppers,' said Alexandor. 'They're not watching 30-second TV ads anymore.' People can use a home computer to make their shopping lists. Once at the store, a shopper can use a preferred customer card to start a system (系统) that will organize the trip around the store. If you're looking for toothpicks, you type in the word or pick it from a list, and a map will appear on the screen showing where you are and where you can find them. The devices also keep a record of what you buy. When you're finished, the device figures out your bill. Then you go to the checker or place your card into a self-checkout stand and pay. The new computerized shopping assistants don't come cheap. The Buddy devices will cost the average store about $160,000, and the Concierge will cost stores about $500 for each device. 53. The underlined word “they” (Paragraph 1) refers to_________. A．supermarkets    B．shop assistants        C．shopping carts    D．shop managers 54. Which of the following is the correct order of shopping with the computerized shopping carts? a. Start the system.                     b. Make a shopping list. c. Find the things you want.             D. Go to a self-checkout stand. A．abdc  B．bacd        C．acbd          D．bcad 55. We can learn from the last paragraph that_________. A．intelligent shopping carts cost a large sum of money B．the Concierge is cheaper than the Buddy devices C．shop assistants with computer knowledge are well paid D．average stores prefer the Concierge to the Buddy devices 56. What might be the most suitable title for the text? A．New age for supermarkets B．Concierge and Shopping Buddy C．New computers make shopping carts smarter D．Touch-screen devices make shopping enjoyable