Unit 1 Caring for Our Earth

Unit 2 Nobel Prize Winners

Unit 3 Famous Brand Name

Unit 4 Cloning and Ethics

Self-assessment Test(Unit 1—Unit 4)

Unit 5 Life-long Education

Unit 6 Travel Around the World

Unit 7 Drug Abuse

Unit 8 Conflicts in the World

Self-assessment Test(Unit 5—Unit 8)

Self-assessment Test(Unit 1—Unit 8)

Refecence Keys to Exercises

Translation for Reference

Glossary

List of Phrases and Expressions

Proper Names