"A hearing book" - wow, that sounds incredible! I've seen some books with dog-ears, but none of them ever listened. It might be one of the living books of Buchhaim/Schattenhall... Or is it just an ordinary audiobook? - "to train the English language" - I thought it's about life, the universe, and everything, and I don't need to train, I've got my babel fish with me.
"It makes sense to improve daily the own language" - well, who hinders you? Go on, buddy. Better you start now, and forget all the fuss about some strange hearing books.
"Why we have all together the possibility to leave on earth?" - hell, do we? I don't intend to leave the earth in the next years, and furthermore: the tickets for the ISS run out fast. Or was it a metaphoric question - to leave means to die? Why, that's a profound question, that is. And, indeed, it gets even deeper :"What is the central meaning of evolution?" - But that's easily answered. It's Forty-two.
"From my point of view, this CD is not for beginners, you need to have a certain English vocabulary on board to improve" - it's obviously not the best stuff for you, then.
"The best time is time in which you can learn for the future" - not for the past? you're sure? It's he who controls the past, who controls the future!
Good ol' Bill Bryson is well-known for his witty observations about people, but I guess he wasn't prepared for this recommendation...