The fact that you are beginning to study this book shows that you are no longer what is called an Intermediate student of English but can be considered Advanced - that is to say, it can be assumed that you can express yourself quite well in English, both in speaking and in writing. This book is intended to help you to improve still further so that you can reach the point where people will say that your English is fluent - a level measured by the Cambridge Proficiency examination, for example.