题目：
Happiness can be described as a positive mood and a pleasant state of mind. According to recent investigations, sixty to seventy percent of Americans consider themselves to be moderately happy, one in twenty persons feel very happy. Psychologists have been studying the factors contributing to happiness. It is not predictable nor is a person in an apparently ideal situation necessarily happy. The ideal situation may have little to do with his actual feelings.
A good education and income are usually considered necessary for happiness. Though both may contribute, they are only chief factors if the person is seriously under - educated or actually suffering from lack of physical needs. The rich are not likely to be happier than the middle-in-come group or even those with very low incomes. People with college education are somewhat happier than those who didn’t graduated from high schools, and it is believed that this is mainly because they have more opportunity to control their lives. Yet people with a very high income and a college education may be less happy than those with the same income and no college education.
It should be noted that people quickly get used to what they have, they are happiest when they feel they are increasing their level, no matter where it stands at a given time. The best formula for happiness is to be able to develop the ability to tolerate frustration, to have a personal involvement and commitment, and to develop selfconfidence and to selfesteem.
In the eyes of the author, the best formula for happiness is to be able to（）。
A. put up with frustration
B. have a personal involvement and commitment
C. be self- confident and self- respecting
D. possess all the abilities above
答案：
参考答案：D
解析：
这是一道考察细节的题型，题干要求回答，在作者眼中，幸福的最佳公式是什么 原文的最后一段“The best formula for happiness is to be able to develop the ability to tolerate frustration, to have a personal involvement and commitment, and to develop self-confidence and to self-esteem．”意思是：幸福的最佳公式是拥有容忍挫折的能力，参与的精神和责任感以及树立自信心和自尊心。由此可知，选项D最符合题意。
