Complete the sentences with the correct form of the words in brackets.
He’s often stressed because his job is so demanding (demand). 

It was quite ______ (embarrass) to make a mistake on the first day at my new job.

Most people think that working from home is _______ (relax), but it isn’t.

There are some people who enjoy ____ (challenge) jobs.

Every morning, he goes home feeling very _____ (tire) after his night shift.

Karen was _____ (determine) to become a doctor, and that’s what she did.

Working as a police officer is very _____ (reward) because you can help people.