Unit One 1
Unit Two 3
Unit Three 5
Unit Four 7
Unit Five 9
Unit Six 11
Unit Seven 12
Unit Eight 14
Unit Nine 15
Unit Ten 16
Unit Eleven 17
Unit Twelve 18
Unit Thirteen 19
Unit Fourteen 20
Unit Fifteen 21
A TEST OF LISTENING AND SPEAKING 23
APPENDIX Ⅰ EXERCISES 26
APPENDIX Ⅱ GLOSSARY 58
APPENDIX Ⅲ REFERENCE KEY TO THE EXERCISES 62