Matroskin Kot: that's an idea indeed... unfortunately, even if I do travel by metro, I have 2 connections and I therefore spend little time on the same line. Anyway...

Crassyo: I realize that I started Pimsleur only in mid-november! But I'm a kind of learnerholic (learning about 2 lessons a day); besides, I focused on speaking, and I merely learnt reading. I did not spend much time on grammar either, and I know it will soon become an inconvience.