托福阅读修辞目的题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的修辞目的题及其对应的解析，供大家参考使用。本文带来的是TPO17-2的修辞目的题，一起来看看吧。
Paragraph 4 The empirical evidence, such as it is, suggests an altogether different function for yawning—namely, that yawning prepares us for a change in activity level. Support for this theory came from a study of yawning behavior in everyday life. Volunteers wore wrist-mounted devices that automatically recorded their physical activity for up to two weeks: the volunteers also recorded their yawns by pressing a button on the device each time they yawned. The data showed that yawning tended to occur about 15 minutes before a period of increased behavioral activity. Yawning bore no relationship to sleep patterns, however. This accords with anecdotal evidence that people often yawn in situations where they are neither tired nor bored, but are preparing for impending mental and physical activity. Such yawning is often referred to as "incongruous" because it seems out of place, at least on the tiredness view: soldiers yawning before combat, musicians yawning before performing, and athletes yawning before competing. Their yawning seems to have nothing to do with sleepiness or boredom—quite the reverse—but it does precede a change in activity level.
12. Why does the author mention “soldiers yawning before combat, musicians yawning before performing, and athletes yawning before competing”?
A. To argue that just the expectation of physical activity can make some people feel tired
B. To explain how the view that people yawn because they are tired accounts for yawning before stressful situations
C. To support the view that yawning helps prepare a person for mental or physical exertion
D. To provide anecdotal evidence that conflicts with the experience of the volunteers in the study
解析：修辞目的题，先看修辞点所在句子，发现只是单纯陈述一个例子，继续往前看，上句说人们打呵欠既不是因为困也不是因为累，而是为了精神上活身体上的活动做准备，所以答案是C。A的expectation，B的stressful situation和D的conflict原文都没说
[4]经验结果表明，虽然如此，打哈欠确实有着完全不同的功能——换而言之，我们打哈欠是为活动水平的变化而做的准备。一个“对日常生活中打哈欠行为的研究”支撑了这一论断。志愿者在手腕上携带一种装置，这一装置会自动记录他们在两周里的身体活动情况。另外，志愿者也要通过点击装置上的按钮来记录自己每一次打哈欠的情况。数据显示，打哈欠大多在增强性行为活动的15分钟前发生。但同时指出，打哈欠与睡眠状态没有关系。这一论断符合坊间的传闻：人们通常是既不疲惫也不无聊，但要准备接下来的脑力活动和体力活动时才会打哈欠。这样的哈欠通常被认为是“不协调的”，因为至少从疲倦状态下的角度看，这样的哈欠似乎与疲惫无关：比如战士们在开始战斗前会打哈欠;音乐家在表演前会打哈欠;运动员在比赛前会打哈欠。他们的哈欠看上去似乎与困倦、疲乏无关，但是恰恰相反，这一行为的确出现在了活动水平的变化之前。
以上就是托福阅读TPO17-2中的修辞目的题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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