Read and analyze the passage carefully before trying to answer any of the questions and pay attention to clues that help you understand less explicit aspects of the passage.

一定要先仔细的分析文章之后，再去做题。

先读题，再从文章里面找答案，还有第三个问题，比如我们经常看到的功能题：

What's the function of the highlighted sentence?/ The author mentions sth.in order to？

它会问你文章里面某个句子的作用是什么。我们看下面这个文章节选的例子，这道功能题，你会选哪个选项？

真题练习

However, surprisingly few extinctions of indigenous species can be attributed to competition from introduced species. For example, during the past 400 years, 4,000 plant species have been introduced into North America, and these non-indigenous plants currently account for nearly 20 percent of North America`s plant species.

The author introduces statistics about North America's non-indigenous plant species primarily in order to

A. undermine a proposed explanation for the absence of any evidence for the occurrence of a particular phenomenon

B. contrast the effect of introduced plant species in North America with the effect that introduced animal species have had

C. suggest that North America's indigenous plants are a domain in which there has been ample scope for a particular effect to have occurred

D. emphasize how much the ecology of North America has been affected over the past 400 years by the introduction of non-indigenous species

E. substantiate a claim about the overall effect that the introduction of non-indigenous species tends to have on indigenous populations

题目解析：

有的同学在做这道题的时候呢，可能就会选择c选项，因为从意思上觉得和文章定位的这个句子非常的相似。

文章这个句子说，外来物种占到本地物种的百分之二十。按照意思对应，C：说明本地物种还有一个很大的空间（ample scope），让某一个事情能够去发生。感觉这个c选项好像就是文章的同意改写=文章说外来物种只占到了本地物种的20%。

但这道题的答案，却并不能选择c选项。这道题的答案是E。因为功能题问的是，这句话在文章里面扮演的角色和作用，所以从功能上，通过for example,这样子的逻辑词，我们就知道题是在支持前面的句子的。

所以如果我们先把文章按照FPI双线法，梳理逻辑和信息之后，就能够知道每句话的功能。做这样子的功能题，就能从五个选项里，快速找到符合预期的选项。

这题，就在选项里面找到支持一个观点的表达。就是E说的，substantiate a claim。支持一个观点。你做题的速度就会更加的快。而且能够帮你避开曾经想选的错误选项。