Unit 1
Lesson 1 Smoke，Fire，and Death
Lesson 2 An Unexpected Explosion
Lesson 3 The Fall of Saigon
Lesson 4 Firetrap!
Lesson 5 A Deadly Plunge
Lesson 6 Nightmare in the Twin Towers
Unit Summarizing 1
Unit 2
Lesson 7 Stay Out of the Water!
Lesson 8 A Sniper in the Tower
Lesson 9 The Night the Dam Let Go
Lesson 10 Flood in Mozambique
Lesson 11 Tragedy in the Baltic Sea
Unit Summarizing 2
Unit 3
Lesson 12 A Horrible Way to Die
Lesson 13 A Strangler Among Us
Lesson 14 The Richard Riot
Lesson 15 A Volcano Wakes Up
Lesson 16 Death Rides the Subway
Unit Summarizing 3
Appendix
Answer Key
