句子插入题(InsertText Questions)是托福阅读部分的必考题型，每篇文章后都会有一个该题型;且出题位置固定，为倒数第二道题。该题型要求考生将一句话插入到原文四个黑色空格的其中一个当中，使得段落看起来更通顺。那么，在以下内容中我们就为大家带来一些托福句子插入题的实例详解，希望能为大家的备考带来帮助。
托福阅读句子插入题：The Pace of Evolutionary Change
【Paragraph 8】■Similar exhaustive studies are required for many different kinds of organisms from many different periods. ■Most researchers expect to find that both modes of transition from one species to another are at work in evolution. ■Slow, continuous change may be the norm during periods of environmental stability, while rapid evolution of new species occurs during periods of environment stress. ■But a lot more studies like Sheldon' s are needed before we can say for sure.(The Pace of Evolutionary Change)
Look at the four squares [■] that indicate where the following sentence can be added to the passage.
They believe that environmental conditions may play a crucial role in determining which of the two modes will be in
operation over a given period.
Where could the sentence best fit?
托福阅读句子插入题答案：3
