Forward
　　Every passage or paragraph should have a main idea. It is the central part of a piece of writing and what the author is trying to tell the reader.
　　If the main idea is implied, it could be found anywhere in the writing, and sometimes you have to find it “between 　the lines”.
　　However, the title or the topic sentence of a writing often directly expresses the main idea.
　　Once you understand the main idea, you get the essence of the writing.
　　Click “Next” to begin.

引言
　　每篇短文或段落都应包含一个主题。主题是一段文字的中心，也是作者要向读者转达的内容。
　　如果主题没有直接表达，那么在篇章的任何地方都可能找到暗示。有时，主题藏匿于“字里行间”。
　　然而，主题常常通过题目或主题句直接表示出来。
　　一旦理解了主题，你就掌握了篇章的核心。
　　点击 “Next” 开始练习。

Directions: Read the following paragraph carefully, and then answer the question. Move your mouse to any of the underlined words in the passage for its meaning in Chinese.

练习说明： 仔细阅读下面的短文，并回答问题。将光标移至带下划线的单词就能显示其中文意思。