3．B　根据下文中“So some nuts remain in the ground.”可知，该空与下文为因果关系。故填B项。

　　4．A　根据下文讲述的内容可知，此处应为主题句，并且与下句为转折关系，文中“are native to”为关键点。

　　5．E　该选项中的“them”与上文所提到的信息一致。

　　Ⅲ.语法填空(建议用时8′)

　　阅读下面短文，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

　　[2016·开封测试]

　　Body and Food

　　Our body, which has close relations with the food that we eat __1__ our daily life, is the most important thing that we own, so our body__2__ (need) proper treatment and proper nourishment (营养).

　　The old saying “An apple a day keeps the doctor away” is not as silly as some people think. The body needs fruit__3__ vegetables, such as apples, pears, bananas, carrots and cabbages, because they contain vitamin C, __4__ is very necessary and important to us all. It's clear that a lack of vitamin C can make people ill and weak easily.

　　In order to get enough needed vitamins, many people take extra vitamins in pill form，__5__ (believe) that these will make them __6__ (health). But a good diet is made up of nourishing food and this gives all the vitamins that we need. The body doesn't need or use extra vitamins, so why waste money on them?

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