在深入分析了2009年考研英语第四篇阅读材料后，以下是对文章的详细解读与答案：
【文章概述】
本文探讨了一个关于城市与乡村生活选择的社会现象。文章以美国为例，分析了城市与乡村生活方式的差异，以及人们对这两种生活方式的不同看法。
【答案解析】
1. 问题：What is the main idea of the fourth reading passage?
答案：The passage mainly discusses the differences between urban and rural lifestyles and people's opinions about these lifestyles.
2. 问题：What is the author's attitude towards urban life?
答案：The author seems to be neutral about urban life. While recognizing its benefits, such as access to education and healthcare, the author also points out its drawbacks, like high cost of living and pollution.
3. 问题：Which of the following statements is NOT mentioned in the passage?
答案：The passage does not mention the economic benefits of living in the countryside.
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