come up with 产生，想出 
Let me come up with some ideas.让我想一想。 
come easily　容易 
Languages come easily to some people.有些人能够很容易地掌握语言。 
cup of tea　喜欢 
Movies are not my cup of tea.我不喜欢看电影。 
cut it out 停止，住嘴 
Cut it out!I can’t stand you any longer. 
call it a day 不再做下去，停止（某种活动） 
Let us call it a day,stop.这一天工作够了，停工吧！　dark horse　黑马 
Nobody considered that John would win the game.He was a dark horse in the final. 
dear John letter　绝交信 

Jack received a dear John letter from his girlfriend because he had broken her heart.