The scientist who wants to predict the way which consumers will spend their money must study consumer behavior. He must 【B1】____

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问题    The scientist who wants to predict the way which consumers will spend their money must study consumer behavior. He must 【B1】_______ data both on the resources of consumers and on the motive that 【B2】_______ to encourage or discourage money spending.
   If an economist were asked which of three groups borrow most—people with rising incomes,【B3】______incomes, or decreasing incomes—he would probably answer, those with 【B4】_______ incomes. 【B5】_______, the answer was: people with rising incomes. People with decreasing incomes were 【B6】_______ and people with stable incomes borrowed least. This shows us that traditional 【B7】_______ about the relation between earning and spending are not always【B8】______. Another traditional assumption is that if people who have money expect prices to go up, they will【B9】______to buy.【B10】______, research surveys have shown that this is not always true. The expectations of price increases may not【B11】______buying. One typical attitude was expressed【B12】______the wife of mechanic in an interview at a time of rising price. "In a few months," she said, "we’ll have【B13】______to spend on other things." Her family had been planning to buy a new car but they postponed this【B14】______.
   Furthermore, the rise in prices that has already taken place may be disliked and buyer’ s【B15】______may be produced. This is shown by the following【B16】______comment: "I just don’t pay these prices; they are too high."
   The investigations mentioned above were【B17】______in America. If prices have been stable and people consider that they are【B18】______, they are likely to buy. Thus, it appears that the common business policy of【B19】______stable prices is based on a correct understanding of consumer【B20】______.
【B12】

选项 A、from
B、by
C、via
D、across

答案B

解析 本句意为“在某次物价上涨时期,一种典型的态度______一位技工的妻子在一次访谈中表达了出来”。本句实际上想表达的是:价格上涨时,人们的典型态度通过一位机械工的妻子在一次采访中说的话表现出来。纵观四个选项,by指通过具体方式,后面可以接人或物,而且是被动语态的标志;from表示“来自于”;via指通过电子、网络类媒介;across 是指平面上的通过。故by符合题意。
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