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TPO34-3的修辞目的题，一起来看看吧。
TPO34-3 Protection of Plants by Insects
Paragraph 5:
Extrafloral nectaries at the base of each sepal attract several kinds of insects, but 96 percent of them are ants, several different species of them. When buds are still small, less than a quarter of an inch long, the sepal nectaries are already present and producing nectar. They continue to do so as the flower develops and while the fruit matures. Observations leave little doubt that ants protect morning glory flowers and fruits from the combined enemy force of grasshoppers, caterpillars, and seed beetles. Bentley compares the seed production of six plants that grew where there were no ants with that of seventeen plants that were occupied by ants. Unprotected plants bore only 45 seeds per plant, but plants occupied by ants bore 211 seeds per plant. Although ants are not big enough to kill or seriously injure grasshoppers, they drive them away by nipping at their feet. Seed beetles are more vulnerable because they are much smaller than grasshoppers. The ants prey on the adult beetles, disturb females as they lay their eggs on developing fruits, and eat many of the eggs they do manage to lay.
9. What role does paragraph 5 play in the passage?
A) It offers various kinds of evidence for the protectionist view.
B) It presents the study that first proved that ants benefit plants.
C) It explains how insects find sources of nectar.
D) It presents information that partly contradicts the protectionist view.
答案：A
解析：针对关系提问的修辞目的题，上段提出One example shows how ants attracted to extrafloral nectaries protect morning glories against attacking insects，本段承接继续解释ants如何保护植物免受其他昆虫的侵害;迷惑选项B 信息概括错误，原文无提及，C 信息概括错误，原文无提及，D 关系概括错误，原文无提及information that partly contradicts the protectionist view。
以上就是托福阅读TPO34-3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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