Most supermarkets need a very large

Most supermarkets need a very large floor area, sometimes at least ten times as big as that of an ordinary shop. There are usually two doors, one as an entrance and the other as an   31  . The rest of the side facing the street is largely of plate glass, with goods or advertising material displayed. The three walls are   32   decorated in light colors, giving an   33   of cleanliness and brightness  At right angles to the window stretch long structures about six feet   34   with a number of shelves on each side. Similar shelf units or frozen food containers extend round the walls. Broad aisles(通道) between the shelf units and ample(足够的) space between them and the window and also the far wall   35   room for the circulation of many people.   36   commodities(商品)， in tins,bags, boxes or other containers, are stacked (堆放) in groups on the shelves, and each group is  37   with a price ticket. Metal baskets near the entrance are taken by the shoppers who collect the goods that they   38   from the shelves.  Between the shelf units and the windows are a number of small comers about three feet high Beside each   39   a cashier, who operates a machine for the totaling cost of each customers pur-chases. The customer places the basket at one end of the counter so that it can be emptied by the cashier who records the price of the commodities one by one, before putting each on a moving section of the counter top. The cashier finally hands a printed slip recording all prices to the   40  , who pays the total, collects the bag and leaves.