解题技巧：

1. 听原文时即可适时判断谈话人的真实意图，谈话人某句讲话修辞手法运用明显之时，往往就是考点出现之处。

2. 熟悉常用修辞手段，如比喻（又分明喻，暗喻等），夸张，比拟，例证，借代，反问，反复，设问等等。

3. 注意根据上线问和谈话气氛来综合回答问题，不要脱离主题凭空猜测谈话人的修辞意图。例如：

(一)

Professor: Through much of the last century, America’s faith in freedom and democracy was a rock in a raging sea. Now it is a seed upon the wind, taking root in many nations.

Narrator:

Listen again to a part of the lecture. Then answer the question.

Professor: …Now it is a seed upon the wind, taking root in many nations.

Why does the professor say this?

A: To encourage the students to think about the issue under a bigger context.

B: To elicit an answer from the students.

C: To compare two different things figuratively to engage his students.

D: To describe an imaginative situation.

解析：

该题是询问为何使用某种修辞手法。

从谈话节选段落中我们很容易看出，教授使用的是暗喻的方法。

该段落大概的意思是：在上个世纪的大部分时间里，美国式民主和自由的信仰如石沉大海，波澜不惊；而今，却如清风拂絮，撒落人间。

暗喻的方式是为了形成对比，从而激起听者的想象力，活跃课堂谈话的气氛。

综上所述正确答案为C。

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