【动物趣语 】1.every dog has its day凡人也有得意时2.dog days三伏天3.let the cat out of the bag 泄密4. black sheep害群之马5.rain cats and dogs 倾盆大雨6.when pigs fly不可能发生的事7.eat like a horse吃的多8.put the cart before the horse 本末倒置9.sweating like a pig汗如雨下（转）