托福阅读句子插入题要求考生联系上下文将所给的句子插入到文章中的合适位置，这类题主要考查考生的逻辑思维能力。在所给的句子中往往会有一些提示词，这些提示词可以给我们提供重要的线索，帮助我们找到句子在文章中的合适位置。下面我们结合具体的例子来看一下如何利用提示词解答托福阅读句子插入题。
提示词一：代词
代词是解答句子插入题的一个重要线索，我们可以根据代词所指代的词性以及单复数来确定句子的位置。句子中的代词大多数是指示代词，如“this”、“that”、“these”、“those”、“such”、“same”、“so”等等。下面我们结合OG-The Origins of Cetaceans中的一道例题来看一下。
Extinct but already fully marine cetaceans are known from the fossil record. ■How was the gap between a walking mammal and a swimming whale bridged? ■Missing until recently were fossils clearly intermediate, or transitional, between land mammals and cetaceans.
■Very exciting discoveries have finally allowed scientists to reconstruct the most likely origins of cetaceans. ■In 1979, a team looking for fossils in northern Pakistan found what proved to be the oldest fossil whale. The fossil was officially named Pakicetus in honor of the country where the discovery was made. Pakicetus was found embedded in rocks formed from river deposits that were 52 million years old. The river that formed these deposits was actually not far from an ancient ocean known as the Tethys Sea.
Look at the four squares [■] that indicate where the following sentence can be added to the passage.
This is a question that has puzzled scientists for ages.
Where would the sentence best fit?
很明显，所要插入的句子中出现了代词“this”，所指代的内容是“question”。据此我们猜测，这句话前面应该是一个问题。但是考生要注意，不一定所有的问题都是以问号结尾的，陈述句也有可能在表述一个问题。那么我们就回到原文找一下，看有没有问题出现。通过阅读我们发现，只有第二个方块前面有一个问题。问题问的是“陆栖哺乳动物和海洋鲸类之间有什么联系?”它和插入句“这是困扰科学家多年的一个问题。”在语义衔接上没有问题。因此，插入句在文章中最合适的位置就是第二个方块处。
提示词二：逻辑连接词
文章中的某些逻辑连接词也可以作为提示词来帮助我们解题。常见的逻辑连接词包括：表示并列、递进关系的and，also，in addition，what’s more等等;表示转折关系的but，however，nevertheless等等;表示因果关系的because，so，result from，result in等等。下面我们结合TPO1-Groundwater中的一道例题来看一下。
Much of the water in a sample of water-saturated sediment or rock will drain from it if the sample is put in a suitable dry place. ■But some will remain, clinging to all solid surfaces. ■It is held there by the force of surface tension without which water would drain instantly from any wet surface, leaving it totally dry. ■The total volume of water in the saturated sample must therefore be thought of as consisting of water that can, and water that cannot, drain away. ■
Look at the four squares [■] that indicate where the following sentence could be added to the passage.
What, then, determines what proportion of the water stays and what proportion drains away?
Where would the sentence best fit?
通过阅读原文我们发现，第一个方块后面有表示转折的连接词“But”，转折句与前面一句联系紧密，不适合再插入句子;第二个方块后面有代词“It”，指代前面的“water”，此处插入句子会破坏代词的指代关系;第三个方块后面的句子中有表示结果的连接词“therefore”，说明这句话与前面的句子联系紧密，中间同样不适合插入句子;因此分析只有第四个方块的位置是合适的，方块前面的句子中有“can, and cannot drain away”，与插入句的内容相对应。
以上就是小编为大家分享的根据提示词解答托福阅读句子插入题的方法，希望能给大家的学习带来帮助。最后，小编祝愿各位考生在托福考试中取得好成绩!
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