use­by dates.“We want this to be clearly communicated so consumers are not misunderstanding

　　the data and contributing to a lot of waste，” said Dana Gunders，a staff scientist with the NRDC.

　　But this won't be a mistake that is easy to correct since people have believed it for so long.Another problem is that the quality levels of different foods change differently—some are still safe

　　to eat long after their use­by date while others are not.

　　As a result，food industry officials are now thinking of changing the use­by date to a date

　　indicating when food is most likely to go bad.

　　【语篇解读】　本文是一篇说明文。文章讲述了人们对保质期的误解。人们通常会把过了保质期的食物理解为不能食用，而把它们扔掉，这造成了很大的浪费。其实，许多过了保质期的食物还是可以食用

　　9．The use­by date was first intended to ________．

　　A．tell the freshness of food

　　B．show the safety of food

　　C．give a warning of food poisoning

　　D．indicate the relation between food and illness

　　答案　A　[细节理解When they first showed up，use­by dates were only supposed to indicate freshness...”可知，最初引入保质期是为了显示食物是否新鲜。故选A。]

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