修辞目的题，是一道重要的托福阅读题，几乎出现在每一次的托福阅读考试中。那么，面对这样一道题，同学们想好如何解了么?如果没有，今天的新托福阅读高分策略，您就必须要认真看下了!
新托福阅读高分策略告诉你修辞目的题，怎么解：
首先，我们来了解一下托福阅读修辞目的题的考察目的是什么。这类托福阅读题目要求我们理解作者为什么要使用或者怎样使用文中的某一信息，通常着重于文章的逻辑发展。我们还要理解句子之间或者段落之间是如何联系的。此外我们还必须清楚什么样的细节在文中提到并起到什么作用。
常见的托福修辞目的题练习题形式有：
1. Why does the author mention…?
2. The author includes the information about…in order to…
3. Why does the author note…?
4. In paragraph…, the author mentions…in order to…
下面我们以练习题31阅读第1篇中的一道修辞目的题来讲解一下：
Paragraph2: Allopatric speciation may be the main speciation route. This should not be surprising, since allopatry is pretty common. In general, the subpopulations of most species are separated from each other by some measurable distance. So even under normal situations the gene flow among the subpopulations is more of an intermittent trickle than a steady stream. In addition, barriers can rapidly arise and shut off the trickle. For example, in the 1800s a monstrous earthquake changed the course of the Mississippi River, a large river flowing in the central part of the United States of America. The change separated populations of insects now living along opposite shore, completely cutting off gene flow between them.
Why does the author provide the information that subpopulations of most species are separated from each other by some measurable distance?
A. To indicate how scientists are able to determine whether subpopulations of a species are allopatric
B. To define what it means for a group of animals or plants to be a subpopulation
C. To suggest that allopatric speciation is not the only route to speciation
D. To help explain why allopatric speciation is a common way for new species to come about
首先，在题干中划名词为定位词，以便迅速地回到原文中找到出题点在哪里。我们可以划的名词有subpopulations，most species，甚至还可以划measurable distance。划出这几个词以后，迅速回到原文当中，我们可以找到这里的出题点就在于“In general, the subpopulations of most species are separated from each other by some measurable distance.”。这里，几乎所有的名词都没有进行同义改写。我们知道“In general”表示“一般来讲”，根据英文惯例，前面一定有了一个定义，然后后面具体解释一般来讲这样的情况会如何发生。所以，尽管你不认识subpopulations或者其他的名词也没有关系，这不会影响到你的做题。既然“In general”表示“一般来说”，解释说明的是前面的句子，那么后面的内容完全是不需要再看的，只需要关注前面两句话“Allopatric speciation may be the main speciation route. This should not be surprising, since allopatric is pretty common.”这时候再看选项：A和B选项是定义句，对subpopulation进行一个解释说明，与文章的内容并不相符，所以排除。C选项当中，“not the only route”其中“only”这个限定词与文章中的内容“the main route”是有矛盾的，所以排除。最后一个选项，就是正确选项。选项当中“allopatric speciation”，“common”这样的词在文章中都有体现，并且，它确实是解释说明了为什么“allopatric speciation”这样的一个物种的形成过程是普遍的。
希望以上内容对大家的备考有所帮助。
