Read the following passage, then choose the correct answer to questions 

  Today, supermarkets are found in almost every large city in the world. But the first supermarket (26)_________opened only fifty years ago. It was opened in New York by a man named Michael Cullen.             A supermarket is different (27)___________other types of stores in several ways. In supermarkets, goods are placed on open shelves. The 28_)__________ choose what they want and take them to the checkout counter. This means that fewer shop assistants are needed than in other stores. The way products are displayed is another difference between supermarkets and many other types of stores; (29)__________ example, in supermarkets, there is usually a display of small inexpensive items just in front of the checkout counter: candies, chocolates, magazines, cheap foods and so on.             Most customers (30)__________go to a supermarket buy goods from a shopping list. They know exactly what they need to buy. They do the shopping according to a plan.

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But the first supermarket (26)_________opened only fifty years ago. It was opened in New York by a man named Michael Cullen.