zielonosiwy thank you for your remark, this only shows how much I need to revise English and asked for advice.
emil05 thank you for your link, I really like it :)
I am asking about CPE certificate because some job offers require to have one and I'm considering if it is really that important.
I am thinking if this book http://www.bookcity.pl/repetytorium-gramatyczne-w-zdaniach-do-tlumaczenia-angielski/pid/17518
is good source of language learning. I mean complete learning with grammar and vocabulary at the same time. Have you used it and can say something about it?