3.make yourself at home 随意,随便 4.save your breath 省口气吧,别白费口舌 5.make sense 有意义,理解 6.cost sb. an arm and a leg 非常昂贵 7.burn a hole in one's pocket 很快被花光 8.fill one's shoes 顶替,令人满意地替代 9.is ice cold 表示理所当然 ...