Ricky Gervais has got a good series explaining difficult to differentiate words (like crack, back and sack). Check it out: http://v.youku.com/v_show/id_XNDg2ODI1MTYw.html
Ricky Gervais has got a good series explaining difficult to differentiate words (like crack, back and sack). Check it out: http://v.youku.com/v_show/id_XNDg2ODI1MTYw.html