The plane needs to fly.
pilot
There is a robbery.
policeman
He is very sick.
doctor
This dog is very sick.
vet
This office is very messy.
cleaner
The doctor needs help.
nurse
He is very hungry.
cook
He has got terrible toothache.
dentist
There is a fire!
firefighter
Vegetables need to be planted.
farmer
The students want to learn.
teacher