Oxford Word Skills books was really help to learn english. In this have an three level of study. They are Basic, intermediate, and advanced.
Oxford Word Skills Basic :
In this edition students who attended the first level and he was learned something in this edition.
Oxford Word Skills Intermediate :
In this book including the vocabulary lesson on it self. Students can archives higher level in their exam.
Oxford Word Skills Advanced :
Oxford word skills advanced book pdf and audio cd free download
