As our book is so complex and long, meanwhile our lessons are not so long than in the book, I have decided, at least for this unit, to come back to our old and well checked method to explain and study, and it is based on this summaries I will upload for you.
I hope you find them so interesting than me. In this summary you will find all the important items we have learned along our classes.
See you soon.
UNIT 9. ATMOSPHERE