托福常用短语（k2）

keep track of time 记住时间

kick downstairs 被撤职

kick off 开始干某事

kick sb upstairs 明升暗降

kick the bucket 死了

kidding around 老开玩笑

kill time 消磨时间

kill time 消磨时间

kill two birds with one stone 一石二鸟

killing¹ one 笑死某人;痛死某人

knock it off 别再讲下去了

Knock on wood. 说话禁忌,赶紧讨个吉利.

knock one flat 把某人打倒在地

knock oneself out 精疲力尽

knock their eyes out 漂亮得使他们目瞪口呆

know one's onions 精通某事

know one's way around 熟悉道路

know-it-all 似乎样样事都知道的人

1 killing   

n.巨额利润；突然赚大钱，发大财

参考例句：

• Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
• Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。