Vocabulary_Job expressions. Difference between work/job/occupation/profession/career

I actually loved working _______ a mailman.

My mother was crying because she has to look ____ a job.

She is a manager with responsibility ______over 100 staff

Stern put Travis in charge _____ the research team.

He spent most of his time watching the fishermen _____ work.

For someone who works _____ sales, Mr Lewis, you are a terrible liar.

The ability to work _______ pressure is an extremely valuable quality.

Employees often need to collaborate or work _____ others to complete tasks and projects.

I switched my major from English literature to mineral and mining engineering, and then I went on to work ______ the company.

What do you do _____ a living?

The medical ... is respected by plenty of people.

I have to admit that my favourite ... is lying on the sofa.

Richard was 25 when he decided on his academic ... .

The legal ... tells us we should know all the laws in order not to break them.

Urgent need for money forced him to take that ....