精选优质文档-倾情为你奉上第2次作业一、阅读理解（本大题共100分，共 5 小题，每小题 20 分）1. Prehistoric men and women enjoyed a more varied diet than people do now, since they ate species of plant and several hundreds thousands types of living things. But only a tiny percentage of these were ever domesticated. Modern shops have hastened a trend towards specialization which began in the earliest days of agriculture. The food of the rich countries has become cheaper relative to wages. It is speedily distributed in supermark
