Introduc 1
tionTable of Units 1
Unit 1 1
Unit 2 25
Unit 3 49
Unit 4 74
Revision Exercises(Unit 1—Unit 4) 99
Unit 5 108
Unit 6 133
Unit 7 157
Unit 8 183
Revision Exercises(Unit 5—Unit 8) 208
Unit 9 215
Unit 10 240
Unit 11 266
Unit 12 290
Revision Exercises(Unit 9—Unit 12) 316
Appendix 1 Irregular Verbs 325
Appendix 2 Phrases and Expressions 326
Appendix 3 Vocabulary 333
Appendix 4 Proper Names 368
Acknowledgements 369