托福阅读句子插入题，属于托福阅读十大题型之一且难度适中，每篇阅读必考题，位于每一篇阅读倒数第二题，也就是最后一道小结题的前面。这道题目会给出一句插入句，要求将这句插入句插入到文章中的某处，插入的地方会在文章中用黑色的小方块【■】显示出来，以下题为例:

原文：【■】The piercing cries of the rhinoceros hornbill characterize the Southeast Asian rain forest, as do the unmistakable calls of the gibbons. 【■】In densely wooded environments, sound is the best means of communication over distance because in comparison with light, it travels with little impediment from trees and other vegetation. 【■】In forests, visual signals can be seen only at short distances, where they are not obstructed by trees.【■】The male riflebird exploits both of these modes of signaling simultaneously in his courtship display. The sounds made as each wing is opened carry extremely well over distance and advertise his presence widely. The ritualized visual display communicates in close quarters when a female has approached.

题目：

Look at the four squares【■】that indicate where the following sentence could be added to the passage. Where would the sentence best fit?

【插入句】There is also the long, rather terrifying call of the male orangutan, which carries over considerable distances to advertise his presence.

一、托福阅读句子插入题考察目的

句子插入题主要考察的是学生对插入句本身关键信息抓取，以及句子间关系，结构成分的把握的能力，比如逻辑推理判断的能力，比如并列，专业，因果，让步等等。句子与句子间并非毫无关联的，一定是通过某种衔接手段联系起来，最终实现整个段落内容上的统一和连贯。

二、托福阅读句子插入题解题思路

Step 1: 【分析插入句】认真分析题目句子，尽可能多从插入句子中，挖掘信息。（具体挖掘到什么信息，如何使用，下面一段会提到）

Step 2: 【预判位置】预判题目句子前后可能出现的文章内容

Step 3：【寻找位置】根据预判，寻找和适合的句子插入位置

Step 4: 【检验位置】将句子放入后，将前后两句话连起来读，检查是否逻辑通顺，意思表达流畅。

雷哥托福Jenny老师下面具体介绍一下具体从“插入句”中能挖掘到什么有用信息，如何利用这些有用信息进行秒选，秒判断。

三、托福阅读“插入句”两大信息挖掘

信息一：指代词

第一种是人称代词，比如he, she, they等词。

第二种是指示代词，比如that, this, the+名词，such等等。

这种插入句中含有“代词”信息，则意味着，寻找这些词所指代对象，就是这句话应该插入的位置所在，也就是插入在指代信息的后面。从原文中找到定位即可。

信息二：逻辑词

逻辑关系词就是指，因果关系，转折关系，递进关系等连接词，比如therefore, because，however等词。比如插入句是：因此北极熊的生存条件越来越恶劣。那需要在原文中寻找的就是北极熊生存条件变差的原因有哪些，并把这句话插入在这个后面。

具体如何使用以上方法呢？雷哥托福Jenny老师举两个TPO题目进行方法解析~

四、阅读句子插入题案例分析

1. “指代词”型：

【原文文本：TPO19  Passage3】

In the middle of the nineteenth century, Louis Agassiz, one of the first scientists to study glaciers, immigrated to the United States from Switzerland and became a professor at Harvard University, where he continued his studies in geology and other sciences. For his research, Agassiz visited many places in the northern parts of Europe and North America, from the mountains of Scandinavia and New England to the rolling hills of the American Midwest.【A】In all these diverse regions, Agassiz saw signs of glacial erosion and sedimentation.【B】In flat plains country, he saw moraines (accumulations of earth and loose rock that form at the edges of glaciers) that reminded him of the terminal moraines found at the end of valley glaciers in the Alps.【C】 The heterogeneous material of the drift (sand, clay, and rocks deposited there) convinced him of its glacial origin. 【D】

题目：Look at the four squares【■】that indicate where the following sentence could be added to the passage. Where would the sentence best fit?

插入句：In his view, there could be no other explanation for the composition of such drift.

解析：

Step1：先读插入句，“In his view”中的“his”是个很明显的指代信号词，说明我们需要从原文中寻找“他的观点”并将句子插入在他的后方。什么观点呢？往后读完这句插入语，“composition of such drift”中“drift”是个极具标志性的词。

Step2: 寻找四个选择中第一次提到“drift”的那一句。

Step3: 迅速定位到D前面那句“material of the drift”是第一次也是为第一一次提到“drift”。

Step4：检验放进去后，逻辑通顺，意思表达无歧义。

所以，正确答案选【D】

2. “逻辑词”型：

【原文文本：TPO20  Passage3】

Petrifaction may also involve a simultaneous exchange of the original substance of a dead plant or animal with mineral matter of a different composition. This process is termed “replacement” because solutions have dissolved the original material and replaced it with an equal volume of the new substance. Replacement can be a marvelously precise process, so that details of shell ornamentation, tree rings in wood, and delicate structures in bone are accurately preserved.

【A】Another type of fossilization, known as carbonization, occurs when soft tissues are preserved as thin film of carbon.【B】Leaves and tissue of soft-bodied organisms such as jellyfish or worms may accumulate, become buried and compressed, and lose their volatile constituents.【C】The carbon often remains behind as a blackened silhouette.【D】

题目：Look at the four squares that indicate where the following sentence can be added to the passage. Click on a square 【■】 to insert the sentence in the passage. Where would the sentence best fit?

插入句：But the evidence of past organic life is not limited to petrifaction.

解析：由于第一个插入位置在段首，所以我们把上一段也放进来了。

Step1: 先读插入句，句首“BUT”是个很明显的逻辑信号词，But...not limited to petrifaction 说明告诉我们，需要从原文在寻找提到Petrifaction的局限的内容。

Step2: 寻找四个选择中带有petrifaction。

Step3: 并没有在ABCD四个选项中找到“petrifaction”，也没有找到同义替换词。而且A这个段首处紧跟一个信号词”Another”，意味着很可能与“fossilization”并列的概念出现在上一段。恰巧，上一段段首出现了“Petrifaction”。说明上一段讲了“Petrifaction”，下一段主要讲“fossilization”。

Step 4: 检验放进去后逻辑通顺，意思表达无歧义。

所以，正确答案是【A】

更精准实用的托福阅读题型小技巧，欢迎报名雷哥托福阅读资深讲师Bella和Merci的课哦~