练习：
1. The information in this passage deals with_______.
A) an individual
B) a social and economic group
C) a political organization
D) government
2. A common middle class value is that________.
A) people should always have fun
B) children should be seen and not heard
C) debt is nothing to worry about
D) the family is very important
3. ln the years after World War II，the middle class could be defined as_______.
A) overburdened and in debt
B) hard working and suspicious
C) prosperous and optimistic
D) young and foolish
4. The phrase “In other words" in the first paragraph means that the following statement is_____.
A) an exception to the previous idea
B) a denial of the previous idea
C) a restatement of the previous idea
D) a contrasting idea
5. The word collectively means______.
A) as a group
B) hesitatingly
C) unknowingly
D) weakly
答案与题解：
1. B 本题的问题是：本文的信息是关于?本文通篇讲述美国的中产阶级，指的是社会和经济群体，因此选择B.
2. D本题的问题是：一个普遍的中产阶级价值观是?本篇第二段最后一句话讲到，“中产阶级的道德观包括个人的责任感、家庭的重要性、对他人的使命感以及相信自我以外的事物”。A、B、C三个选项不包括在内，因此正确答案是D.
3. C 本题的问题是：在二战之后的几年，中产阶级可以被定义为，本篇第一段提到了当时美国经济不断增长并且人们生活水平有了提高，因此选择C选项，繁荣并且乐观。
4. C 本题的问题是：第一段中的"ln other words"这个短语与下列说法一致的是，"In other words"汉语意思是换句话来说，因此正确答案是C.
5. A 本题的问题是：单词"collectively"的汉语意思是“相同地”，选择A.