Question 15 is based on the passage you have just heard.

15. What does a speaker want to show by the example of the Chicago woman?

解析：D。本题目为推理题。问题为：讲话人用芝加哥一女士的例子，想表达什么？原文所在句：One Chicago woman, for example, discovered that daily lunches with coworkers cost her $2000 a year; she decided to take lunch to work instead. “I now put $20 a week into my vacation fund and another 20 into retirement savings,” she says, “Those mean more to me than lunch.” 芝加哥的这位女士发现和同事一起吃午餐一年花费2000美元，她决定自己带午餐，将每周节省下来的20美元作为假期基金，另外20美元作为退休储蓄，她说这些要比午餐的意义大。此题需要基于理解文章的主旨才能选出，文章批判了奢侈浪费、生活中不规划而进行随性消费等行为，认为从小的方面积累和节约会积少成多，做更有意义的事情。选项D) Small daily savings can make a big difference in one’s life（日常小小的节省可以给生活带来很大的不同），与文中主旨相一致。