修訂版前言 初版前言 CENERAL INTRODUCTION TO CECL(for the teacher) UNIT 1:LANGUAGE UNIT 2:ENTERTAIMENT UNIT 3:ANCIENT CIVILIZATIONS UNIT 4:SCIENCE AND TECHNOLOGY UNIT 5: REVIEW MID-TERM TEST UNIT 6:SOCIAL PROBLEMS UNIT 7:INTERNATIONAL RELATIONS UNIT 8:ECONOMICS AND TRADE UNIT 9:MYTHS AND RELIGIONS UNIT 10:REVIEW FINAL TEST