托福阅读十种题型中的修辞目的题注重考察单词，短语或句子在句子之内或句子之间起到的作用，这就要求大家平时阅读时，在涉猎原文细节信息的基础之上，要有意识地注意句子之间的逻辑关系以及段落的结构。
　　Paragraph 3：The numbers of deer have fluctuated markedly since the entry of Europeans into Puget Sound country. The early explorers and settlers told of abundant deer in the early 1800s and yet almost in the same breath bemoaned the lack of this succulent game animal. Famous explorers of the North American frontier, Lewis and Clark had experienced great difficulty finding game west of the Rockies and not until the second of December did they kill their first elk. To keep 40 people alive that winter, they consumed approximately 150 elk and 20 deer. And when game moved out of the lowlands in early spring, the expedition decided to return east rather than face possible starvation. Later on in the early years of the nineteenth century, when Fort Vancouver became the headquarters of the Hudson's Bay Company, deer populations continued to fluctuate. David Douglas, Scottish botanical explorer of the 1830s. Found a disturbing change in the animal life around the fort during the period between his first visit in 1825 and his final contact with the fort in 1832. A recent Douglas biographer states:" The deer which once picturesquely dotted the meadows around the fort were gone [in 1832], hunted to extermination in order to protect the crops."
　　5.The author tells the story of the explorers Lewis and Clark in paragraph 3 in order to illustrate which of the following points?
　　A The number of deer within the Puget sound region has varied over time.
　　B Most of the explorers who came to the Puget sound area were primarily interested in the West.
　　C There was more game for hunting in the East of the United States than in the West.
　　D Individual explorers were not as successful at locating games as were the trading companies.
　　解题：
　　1 找出题目关键词。
　　本题关键词组：the explorers Lewis and Clark
　　2 用关键词在文中找到定位句，读定位句+前一句。
　　The early explorers and settlers told of abundant deer in the early 1800s and yet almost in the same breath bemoaned the lack of this succulent game animal. Famous explorers of the North American frontier, Lewis and Clark had experienced great difficulty finding game west of the Rockies and not until the second of December did they kill their first elk.
　　句意：早期的探索家和殖民者在19世纪初期都发现鹿群数量之大，然而几乎同时惋惜这种狩猎动物的缺乏。著名的北美边境探险家，Lewis和Clark曾在西部落基山脉寻找这种狩猎动物，但是难度相当大，直到次年的十二月份才捕猎到第一只麋鹿。
　　读了这两句发现，Lewis和Clark的故事是对其前一句内容的具体说明，是为了说明狩猎动物的变少。
　　3 看选项，找出符合原意的即可。
　　本题A选项：普吉特海湾鹿群的数量的不断变化。符合题意
　　BCD选项都是偏离句意的。