81. in the soap 遇到麻烦
82. keep one's head 镇定
83. keep one's shirt on 不动手打架
84. keep punching 继续努力
85. kick off 开始干某事
86. kill two birds with one stone 一石二鸟
87. knock it off 别再讲下去了
88. Knock on wood. 说话禁忌;赶紧讨个吉利.
89. let the cat out of the bag 泄漏秘密
90. let nature take its course 顺其自然
91. like a cat on hot bricks 热锅上的蚂蚁
92. like a turtle on its back 对事情束手无策
93. lousy clichés 陈词滥调
94. make a hit 出风头
95. make my mouth water 使我垂涎
96. master key 万能钥匙;关键
97. neck and neck 不分上下
98. need other's shoulder 希望得到某人的安慰
99. no sweat 没问题;不用冒汗
100. No money, no honey. 没有钱,哪有爱情