三：修饰成分无误，即：出去主句之外的文字。有时候细节决定成败，对比选项的修饰性成分是否跟原文一致。下面以TPO5第三篇文章为例来详解策略三的具体运用。
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.
1. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
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.
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.
Though at first they thought otherwise, paleontologists now agree that the animals in the Tommotian have body forms from which modern animals have descended.
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.
原文中有描写leaving no descendants in modern animal groups，选项A和C 都说have descended，因此这一细节直接可以让这两个选项出局，再看最后D说 It is unclear whether…should be assigned to various modern animal groups，而文章明确有说leaving no descendants in modern animal groups，因此也可以排除D. 最终答案是B。
四：最佳答案胜出。在阅读中有时候难免会有两个看似都对的选项，这时要从以上三点综合考虑，看哪个是选项最贴近于原文，如哪个更全面选哪个。
下面以TPO6第一篇文章为例来详解策略四的具体运用。
Only the last of these was suited at all to the continuous operating of machines, and although waterpower abounded in Lancashire and Scotland and ran grain mills as well as textile mills, it had one great disadvantage: streams flowed where nature intended them to and water-driven factories had to be located on their banks whether or not the location was desirable for other reasons.
1. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information．
○ Running water was the best power source for factories since it could keep machines operating continuously but since it was abundant only in Lancashire and Scotland, most mills and factories that were located elsewhere could not be water driven．
○ The disadvantage of using waterpower is that streams do not necessarily flow in places that are the most suitable for factories which explains why so many water—powered grain and textile mills were located in undesirable places
○ Since machines could be operated continuously only where running water was abundant, grain and textile mills as well as other factories tended to be located only in Lancashire and Scotland．
○ Running water was the only source of power that was suitable for the continuous operation of machines, but to make use of it factories had to be located where the water was, regardless of whether such locations made sense otherwise.
选项A说Running water was the best power source，其中the best原文没说，另外A和C中only in Lancashire and Scotland描述错误。选项B本身没有错误，但是它只讲了 the disadvantage，不全面，也没有说出原文中although的让步逻辑，因此也可以排除。学生在做题是往往看到差不多的选项就下定论了，其实还是应该看完四个选项的。经比较，D选项不仅对原文意思转述完整，更表达出了让步的逻辑关系，因此入围最佳选项也当之无愧。