In the business world，a popular phrase is“value for money.”People want their cash to go as far as possible.However，another is fast obtaining an advantage：“value for time.”The biggest restriction on our resources is the number of hours we can devote to something，so we look to maximize the return we get on our investment of time.By reading this passage you are giving over a bit of your time which could be spent doing other activities，such as sleeping and eating.In return，however，this passage will help you to think like an economist，closely considering the opportunity cost of each of your decisions.

　　【语篇导读】　本文是一篇说明文，作者通过生动简洁的例子向读者论述了经济学家提出的“机会成本”的概念。

　　★1.According to the passage，the concept of“opportunity cost”is applied to ________．

　　A．making more money

　　B．taking more opportunities

　　C．reducing missed opportunities

　　D．weighing the choice of opportunities

　　答案　D　[细节理解题。根据文章第一自然段第二句话对“机会成本”这一概念的论述可知“机会成本”是用来衡量机会选择的。故选D。]

　　★2.The “leftover...time”in Paragraph 3 probably refers to the time ________．

　　A．spared for watching the match at home

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