18 Unit 8

18.1 Introduction

18.1.1 Topics covered in this unit

18.1.2 Prerequisites to the unit

18.1.3 Material you will need

18.2 References

18.2.1 Reference List

18.2.2 Vocabulary

18.2.3 Reference Notes

18.2.3.1 Notes on №

18.2.3.2 Notes on №

18.2.3.3 Notes on №

18.2.3.4 Notes on №

18.2.3.5 Notes on №

18.2.3.6 Notes on №

18.2.3.7 Notes on №

18.2.3.8 Notes on №

18.3 Drills

18.4 Criterion test

18.5 Appendices

18.5.1 Appendix

18.5.2 Appendix

18.5.3 Appendix

18.5.4 Appendix

18.5.5 Appendix