I brought my DVD player to the English class  and I explained Even I catch the sound, I can not understand the line if there is a word I don’t know.  I shoed one seen and a boy said  “ Nuts, I should’ve got his autograph “  I did not two words “Nuts” and “autograph” So when I head it  I could not get it.  But later I knew the meaning of them I could get him.  So I must know many words to lean listening exercise..