8 to have difficulty doing something [英,口]
某事做起来很困难 BrE spoken
have a job doing sth/have a job to do sth
19 is used in a more general way to talk about activities that you do to earn money, either working for a company or for yourself. Do not say ‘what is your job?’ or ‘what is your work?’. Say or 不要说 what is your job? 或 what is your work?,而要说 what do you do? or 或 what do you do for a living?
Work what do you do? what do you do for a living?