Relacionar Columnas COMMON IDIOMS IN ENGLISHVersión en línea A short list of common idioms in English. por kepa olaizola garcia 1 Hit the books. 2 When pigs fly. 3 Let the cat out of the bag. 4 You can´t judge a book by its cover. 5 Piece of cake. 6 Costs an arm and a leg. 7 Hit the nail on the head. 8 Take it easy. 9 Break a leg. 10 Sleep on it. Something is very easy. To study. Something is very expensive. To disclose a secret that was supposed to be kept. To think. Good luck. Relax Something will never happen. Something that is precisely right. You shouldn´t decide upon something based just on outward appearances.