One supermarket in Tokyo has managed to solve the problems of shoplifting， ___1by cashiers， and long lines of customers waiting at cash registers. It is Japan‘s advanced computer technology that has come ___2 with the answers.
Shoppers at an OK supermarket on the outskirts of the city now push a cart ___3 a plastic card chained to it and buy from glass cases where the goods are on display. The plastic card has magnetic number imprinted on it. Each customer carries his or her own card， which is ___4 at the entrance. While shopping， the customer pushes the card into a slot beside ___5 items are wanted and pushes a button or two. The glass covered vending machines are connected to a computer that ___6 the price of every item in the store. Prices of every purchase are added up automatically. When she has finished shopping， the customer hands her card to a cashier who ___7 it to the register. A second later the total pops out. Shoplifting is physically impossible. Once you touch a commodity the computer remembers it ___8 you hide it or even if you eat it on the spot. A cashier at the OK supermarket is now able to work 15 times faster than her ___9 at a conventional supermarket. Only two cashiers， ___10， are required at the store， which sells 2，500 separate items. One man is enough to keep the vending machines filled， because of the stock for a certain commodity is ___11 to run out， a red lamp in the computer room___12 him. But there are disadvantages too: a customer cannot change his or her mind ___13 a purchase. Once ___14， the item cannot be put back. The customer must go through a cashier with it first and get a refund later. There are also no ___15 vegetables or fish on sale-everything is prepackaged.
声望
金币
