A) The main sentence of every paragraph is as follows: 1. "Linguists are full of theories about how people learn – the use of short term and long term memory, how the brain encodes ideas, the use of mnemonics and lots more complicated techniques." 2. "You don't need to know all that to learn a language." 3. "Stick words on your bathroom mirror if it helps – or chant verbs while you go for a walk or jog – but the main thing is to actually use the language – to listen and to speak." 4. "Find a native English speaker – it doesn't matter where you live anymore, there will be someone in the area, or you can find someone online on a social network like Facebook, Twitter, BlogSpot, Second Life, yo