第一部分、阅读理解（75分）
下面有三篇短文，每篇短文后有几个问题，每个问题都有四个备选答案。请仔细阅读短文，并根据短文回答其后面的问题，从四个备选答案中选择一个最佳答案涂在答题卡相应的位置上。 
Pizza Inn
Pizza Inn is a large food system with over five hundred units. Pizza Inn makes a special effort to train its five hundred independent units to give a good image of the fast-food chain. If one unit prepares its food badly. gives slow service, or fails to keep the place clean, this hurts the other units in the system.