本章主要分为四部分，即热身活动与课文背景介绍，文本赏析，文本语言点的理解与运用，以及拓展阅读与思考活动，本单元的知识结构如下图所示。

Warm-up

●Questions

●California Fires

※Background Information

●Author

●Pompeii

●Naples

●Gladiators

Text Analysis

1. Theme

2. Structure

3. Questions

4. Discussion

Writing Devices

Language Study

1. Word Study

Cloudburst / collapse / descend / doom / erupt / flee / graze / intact / perish / reverberate / shroud / summit / topple / volcanic

2. Phrases and Expressions

be at hand / be in place / blow up / break loose / clear away / come to life / cram sth into / die away

3. Grammar

1) Past Participle as Adverbial Modifier

2) Past Participle as Object Complement

4. Word Formation

●prefix—mono-

●suffix—-en

Extension

1. Oral Work

2. Quizzes

3. Writing

4. Listening Lab