Nivåbedomning

Hi everybody!

I have to take an English level test in January in order to decide which English course I will have to study. I would like to start directly at Engelska 6. What is the equivalent of Engelska 6? I mean B2, C1? 

Does anybody knows which the requirements  are for this course? What should I study this month? Any book that someone can recommend me?

Thank you so much!