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  3. What do we mean by a satisfactory standard of living? Obviously, it must include the basic necessities of life such as food, clo

What do we mean by a satisfactory standard of living? Obviously, it must include the basic necessities of life such as food, clo

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问题     What do we mean by a satisfactory standard of living? Obviously, it must include the basic necessities of life such as food, clothing and shelter. To get these necessities on regular basis, a person must have a reliable income. But we have other needs which would probably also be included as basic, such as health and education facilities.
    We may think of all of these as our needs. Yet most of us would be far from satisfied if we had nothing more than these which are supplied for us. We all enjoy extra income to spend on things like books, sports or hobbies. Sometimes we save some of this extra income to pay for future expense of this type on holidays. So we must add our wants to our basic needs. Our standard of living is the degree, to which these needs and wants are satisfied.
    But as time goes on, what we think of as our basic needs changes. Twenty years ago a television would have been a luxury, and still is in many countries now. Even now we cannot say it is a need in the same sense as food, clothing and shelter. Yet if most of the people of a country have one, it comes to be accepted as a need．It is possible therefore to have food, clothing and shelter and still be poor by the standards of our own society.  
With time going on, ________.
选项 A、a luxury may change into a need which most people want to get
B、the basic needs are getting smaller and smaller
C、a luxury and the basic needs can be exchanged
D、the basic needs can be changed into a luxury
答案A
解析 推理判断题。根据文章最后一段所举的例子，基本需求的概念是可以改变的，20年前电视是一种奢侈品，但现在也已经成为了一种生活必需品。可见奢侈品可转化成生活必需品。所以选A。其他选项文章都未提到。
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