D Super*s are trying o

D Super*s are trying out new computers that make shopping carts more intelligent. They will help shoppers find paper cups or toilet soap, and keep a record of the bill. The touch-screen devices are on show at the Food Marketing Institute’s exhibition here this week, “These devices are able to * value and get you around the store quicker,” said Michael Alexander, 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-*ed 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 Alexander. “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 device also keeps 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. 48. The underlined word “they”（paragraph 1）refers to ____________. A. super*s B. shop assistants C. shopping carts D. shop managers 49. 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 50. What might be the most suitable title for the text? A. New age for super*s B. Concierge and Shopping Buddy C. New computers make shopping carts smarter D. Touch-screen devices make shopping enjoyable
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解题思路： 理解短文的意思；分析句子结构；熟练运用语法,从文中获取有效信息。
解题过程：
48 C 点评：由上下文可以看出“they”指的是“computerized shopping carts”。
49.A 点评：本题易错选 B。文中说这种智能装置“don’t come cheap”，可以确定 A是对的。而文中最后一句话是指“一家超市要装备齐全The Buddy devices一般共需花费160，000，而The Concierge则是配备一台购物手推车就需500，一家店得装备许多台才行”。
50.C 点评：主题思想理解题。文章第一句话既是本文的核心句（the key sentence）

最终答案：CAC