举例题，事实上是托福听力考试中很常见的一种题型，在每场托福考试听力部分中至少会出现2个左右。对应到这种常考题型，有模式化的题型特征，通常问题形式都是Why does the professor mention……?应对这种题目其实不算难，把握好“举例论证”的用法分析出例子的作用就可以了。
比如：TPO24Lecture1生物学讲座中的第五题
5. Why does the professor mention dogs?
A. To explain that mammals are more complex than reptiles
B. To point out that crocodiles can communicate with dogs
C. To give an example of mammals that care for their young
D. To emphasize that crocodiles have highly developed brains
这个题目就是一个非常典型的“举例题”。我们所知道的举例论证通常都是statement+ example的形式，那么事实上，我们需要听的获取的信息点就是这个statement部分，也就是我们只要听到一些consider，for example，like, think about，say….这些表示举例关系的考点信号词，然后赶紧回忆前面一句话的内容，并结合例子本身，是不难找到答案的。
对应原文：
Crocodiles have about eighteen different sounds that they can make. There’s...um...um… you have deep grunting sounds, hisses, growls, are many different sounds to interact or send messages. This is more typical of mammals than of reptiles. I mean, crocodiles' brains are the most developed of any reptile. In that sense, they are closer to mammals' brains than other reptiles' brains. And we know that mammals, dogs for example, dogs vocalize many different sounds. Crocodiles have a similar level of, uh, vocal sophistication, if you will, which makes them unique among reptiles.
首先，我们找到的一个表示举例关系的关键词，for example，然后对应到例子前面那句话，crocodiles' brains are the most developed of any reptile. In that sense, they are closer to mammals' brains than other reptiles' brains.3⃣这句话，所以很容易地找到了这个题目的答案D。
PS：⚠这道题一定要注意A选项，因为A选项从生物学学科知识来说，算是一个事实性的科学常识，选项本身永远正确，所以极具迷惑性，所以方法二，同学们可以区分段落主旨来判断选项的主要内容（一定程度上可以理解为句子的主语），比如这个段落中很明显在讲crocodile（鳄鱼，爬行动物reptile不是选项A中的哺乳动物）所以A选项排除，之后用排除法就更简单喽。
