中学生百科英语3：Cause&Effect

Unit 1　Explorers
Lesson 1　Burke and Wills:Across Australia
Lesson 2　Alexandra David-Neel:A French Woman in Tibet
Lesson 3　Vitus Bering:Across Siberia to North Amecia
Lesson 4　Robert Scott:A Race to the South Pole
Lesson 5　Into the Deep:Ocean Exploration

Unit 2　World Issues
Unit 3　A Mishmash,or Hodgepodge
Unit 4　Science
Unit 5　Medicine and Health
Unit Quiz
Vocabulary
Skills Index
Video Transcripts