在托福阅读当中，大家应该对于定语从句都不陌生吧. 因为定语从句基本上算是托福长难句中的一个比较厉害的拦路虎了。那么定语从句在句子简化题中的分量有多重呢?我们通过一道题来看一下。

　　Fladmark’s hypothesis received additional support from the fact that the greatest diversity in native American languages occurs along the west coast of the Americas, suggesting that this region has been settled the longest.

　　A. Because this region has been settled the longest, it also displays the greatest diversity in Native American languages

　　B. Fladmark's hypothesis states that the west coast of the Americas has been settled longer than any other region.

　　C. The fact that the greatest diversity of Native American languages occurs along the west coast of the Americans lends strength to Fradmark's hypothesis.

　　D. According to Fladmark, Native American languages have survived the longest along the west coast of the Americas

　　在这道题目中出现了一个很长的定语从句that the greatest diversity in native American languages occurs along the west coast of the Americas, suggesting that this region has been settled the longest. 我们知道不带标点的定语从句就相当于一个形容词，所以我们直接看这个句子的主干部分就是Fladmark’s hypothesis received additional support from the fact。即F的假说得到了一个什么样的事实的支持，那我们在去找主干部分的时候只需要找到跟此内容对应的部分即可。这个题的答案是C选项。在C选项里也出现了一个定语从句that the greatest diversity of Native American languages occurs along the west coast of the Americans，将定语从句部分除去之后，整个句子就变成了The fact lends strength to Fradmark's hypothesis.即一个什么样的事实给了F的假说以力气。这样的定语从句是不是很神奇呢。

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