According to the passage, finding out the social costs of a public good is a _____.

A．difficult procedure

B．daily administrative duty

C．matter of personal judgement

D．citizen' s responsibility

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答案解析

事实细节题。
文章第三段第一句指出，确定使用公共商品的社会成本和社会效益不是一件容易的事。故选A。

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1 Which of the following statements best describes the organization of the first two paragraphs?

A．Suggestions for the application of an economic concept are offered.

B．Several generalizations are presented from which various conclusions are drawn.

C．Persuasive language is used to argue against a popular idea.

D．A general concept is defined and then examples are given.

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2 根据以下材料，回答题
We can make mistakes at any age.Some mistakes we make are about money.But most mistakes are about people."Did Jerry really care when I broke up with Helen? When I got that great job, did Jim really feel good about it, as a friend? Or did he envy nay luck?" When we look back, doubts like these can make us feel bad.But when we look back, it' s too late.
　　Why do we go wrong about our friends or our enemies? Sometimes what people say hides their real meaning.And if we don' t really listen closely we miss the feeling behind the words.Suppose someone tells you, "You' re a lucky dog." That' s being friendly.But "lucky dog" ? There' s a bit of envy in those words.Maybe he doesn' t see it himself.But bringing in the "dog" puts you down a little.What he may be saying is that he doesn' t think you deserve your luck.
　　"Just think of all the things you have to be thankful for" is another noise that says one thing and means another.It could mean that the speaker is trying to get you to see your problem as part of your life as a whole.But is he? Wrapped up in this phrase is the thought that your problem isn' t important.It' s telling you to think of all the starving people in the world when you haven't got a date for Saturday night.
　　How can you tell the real meaning behind someone's words? One way is to take a good look at the person talking.Do his words fit the way he looks? Does what he says agree with the tone of voice? His posture? The look in his eyes? Stop and think.The minute you spend thinking about the real meaning of what people say to you may save another mistake.
　According to the author, the reason why we go wrong about our friends is that ________.

A．we fail to listen carefully when they talk

B．people tend to be annoyed when we check what they say

C．people usually state one thing but mean another

D．we tend to doubt what our friends say

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3 In the sentence "Maybe he doesn' t see it himself" in paragraph 2, the pronoun "it" refers to________.

A．being friendly

B．a bit of envy

C．lucky dog

D．your luck

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