Packed like sardines 拥挤不堪

　　Tom, Dick and Harry 随便什么人

　　Keep an ear to the ground 保持高度警觉

　　On top of the world 幸福至极

　　Making the grade 达标了

　　As good as gold(表现)很乖

　　Hands-on 亲自动手

　　To go out with a bang 圆满结束

　　Like a duck to water 如鱼得水