A : What do you do for a living?
     - 직업이 무엇입니까?

B : I'm a civil servant.
     - 공무원입니다.

A : How long have you had this job?
     - 얼마나 오래 하셨어요?

B : I've been working since I was twenty.
     - 20살때부터 했어요.