Most people who work in London get a break of about an hour for lunch.  36  they mostly live too far from home to go back there  37  lunch, they have to  38  other arrangements for their midday meal.
Many large companies have a canteen (自助食堂) for their employees. In  39  canteens the food served is simple but  40 , and there is some  41  of choice. But the number of dishes 42 usually small. The employees themselves fetch their dishes  43  a counter at which they are 44. There they can find a tray on  45  to carry their knives, forks, spoons, plates, cups, saucers, 46, of course, their food. A meal in a canteen is inexpensive and may  47  of soup, fish and chips or meat and two vegetables,  48  fruit or pudding of some  49  as dessert. Some companies that do not run a canteen  50  their staff with luncheon-vouchers (午餐券), which many restaurants will accept in 51  of money.
As there are so many people  52  work in London, there are numerous cafes and restaurants in every area that is not purely residential. A meal  53  cost anything from a modest sum to quite a few pounds,  54  on the restaurant and the food chosen.  55 , one can generally get a meal, or at least a snack, in a pub. In recent years there has also been a big increase in the number of ‘take-away’ food shops of all kinds.

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A．full B．limited C．extra D．enough

A．exchange B．variety C．change D．difference

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