4．The text probably comes from ________.

　　A．a guide book

　　B．a popular magazine

　　C．a book review

　　D．an official document

　　答案与解析

　　本文为说明文。文章介绍的是一个对美国老年人健康习惯调查的结果以及专家给出的对策。

　　1．D　细节理解题。根据文章开头部分可知，多数美国老年人没有好的习惯，故A项错误；30%的美国老年人每天洗手四次，而不是每周洗澡三天，故B项错误；根据第三个问题下Finding中的内容"Seniors are not fighting germs as well as they should."可知C项错误。根据第一个问题下Finding中的内容"A full 33% of seniors brush their teeth only once a day."可知D项表述正确。

　　2．D　细节理解题。根据第二个问题下Finding中的"And nearly 30% wash their hands only 4 times a day - half of the number doctors recommend."可知，每天洗手四次只是医生建议的一半，由此可知，医生建议的次数是每天八次。故选D。

　　3．C　细节理解题。根据第三个问题下Step内容中的"Do you know it is not your toilet but your kitchen sponge (海绵) that can carry more germs than anything else？"可知C项正确。

　　4．B　文章出处题。通读全文可知，本文显然不是书评(a book review)，也不是政府文件(an official document)。A项有较强的干扰性，但本文主要是面向公众的日常知识普及，而不是生活指导。故选B。

　　Ⅱ.七选五

　　(2017·内蒙古赤峰二中月考)

　　While going through life with the pursuit of money on our mind, we're often told that money can't buy happiness. But what truth is there in the saying? Is there a relation between money and happiness? __1__

　　Humans are very sensitive to change. When we get a rise, we really enjoy it. But some studies have shown that in North America, additional income beyond 75,000 dollars a year stops impacting day­to­day happiness. __2__They often end up spending all the money, going into debt, and experience ruined social relationships.

　　So surely money can't really buy happiness. Well, recent studies suggest that the problem may actually be in the way that we spend money.__3__ Studies show that people who spend their money on others feel happier. As for the people who spend money on themselves, their happiness is unchanged.

__4__ One experiment showed that instead of an organization writing a large check to a