My boss makes sure everybody follows the rules and does what she wants. She is very ___________ (tough, strict, punishing)

When climbing up Mount Everest you need to focus on getting to the top. It is __________. (arduous, rigorous, gruelling)

Practicing Boxing/Martial Arts leaves you hurting at the end of each day. It is quite __________. (tough, punishing, arduous)

7 days working in the muck is not pleasant work. It is __________. (arduous, rigorous, gruelling)

Military training requires running, climbing and so many push-ups that you feel like your arms and legs will break. It is very __________ (punishing, tough, arduous)

Becoming an expert is an admirable goal but a/an ___________ journey. (arduous, rigorous, tricky)

The assignment was not easy to finish although the instructions were clear. It was __________. (tough, tricky, punishing)

Professional Dancers have to remember a lot of steps. Their training is very _____________. (rigorous, arduous, gruelling)

Working as a military medic taking care of wounded and dying soldiers, missing arms and legs, is very ___________ (arduous, gruelling, rigorous)

Legal Training requires learning a lot of things with a lot of details. It is very __________. (Rigorous, Punishing, Tricky)

A Junior Dr. works 100 hours per week with sick and injured people. It is very __________ work. (arduous, gruelling, rigorous)

Important rules/laws have to be followed without exception. They have to be _________ (tough, tricky, strict)