Lectures! What lecture do you think is better to learn English, a topic that you like? a book regarding to your work or study? a literature book? a history book? a comics book? what will you read to learn and improve your English?

which of these sentences are correct? I was very focused reading a book. I was very concentrated reading a book. I had very focused reading a book. I have very concentrated reading a book. Cual de estas oraciones suena mejor o esta gramaticalmente bien! para cuando quiera decir: "Estaba bien concentrado leyendo un libro."

how I know my English level? I would like to know how much English I have learned, if some one can recommend any website to check my English level, Thanks for advance! a free web site!!!!

"warranted" and "guaranteed" means the same?

the verb "too" and "also" "too and also" sometimes they have the same meaning. how can I know if i have to use the verb also or too?