The passage is organized chronologically, starting from the early 20th century.

这篇文章按时间顺序组织，从20世纪初开始。

同一单元的其他句子

• Reading comprehension requires understanding the author's main argument.阅读理解需要理解作者的主要论点。
• Have you analyzed the tone of this passage?你分析过这篇文章的语气吗？
• The article discusses the impact of technology on education.这篇文章讨论了技术对教育的影响。
• Do not skim the text; read every detail carefully.不要略读文本，仔细阅读每个细节。
• Inference questions often require reading between the lines.推理题通常需要体会言外之意。