句子简化题是托福阅读十大题型之一，也是比较难的一类题。下面小编为大家讲解这类题的做题方法，一起来看一下吧。
At one time, the animals present in these fossil beds were assigned to various modern animal groups, but most paleontologists now agree that all Tommotian fossils represent unique body forms that arose in the early Cambrian period and disappeared before the end of the period, leaving no descendants in modern animal groups.
A. The animals found in the Tommotian fossil bed were once thought to belong to a variety of modern animal groups, but now they are thought to have descended from a single group.
B. Animals in the Tommotian fossil beds were initially assigned to modern animal groups but are now thought to belong to groups that emerged and died out during the Cambrian period.
C. Though at first they thought otherwise, paleontologists now agree that the animals in the Tommotian have body forms from which modern animals have descended.
D. It is unclear whether the Tommotian fossils from the early Cambrian period represent unique body forms or whether they should be assigned to various modern animal groups.
解题：
1. 看原句是否有逻辑关系词
浏览原句，发现有but这个表转折的逻辑词。
该句句意：曾经，存在于这些化石中的动物被规定为现代动物种群，但是，如今，考古生物学家认为所有的Tommotian化石代表独有的个体，它们起源于寒武纪初期，并消失于该纪元的末期，导致该动物种群在现代动物种群中没有留下后代。
2. 看选项表达转折关系的逻辑词
A选项有but;B选项有but;C选项有although表让步转折;D选项是没有逻辑关系的复合句，因此把D选项首先排除。
3. 细节对比解题
在A，B，C三选项中，A选项句意：在Tommotian化石床中发现的动物曾被认为属于现代动物种群，但是现在，它们被认为是单一动物种群的后代。显然，“但是”后的内容与原句“但是”后的内容完全不符;B选项句意：在Tommotian化石床中发现的动物最初被规定为现代动物种群，但是现在被认为属于出现于寒武纪初期，灭绝于寒武纪末期的动物种群。B选项但是前后的内容和原句但是前后的内容完全吻合。其他选项都不符合文章内容，直接排除，因此正确答案就是B选项。
以上就是托福阅读句子简化题的解题方法，希望能给考生的学习带来帮助。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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