A person who flies an aircraft
Pilot
A person who has been trained for travelling in space
Astronaut
Someone who drives a vehicle
Driver
A person with a medical degree whose job is to treat people who are ill or hurt
Doctor
An official organization whose job is to make people obey the law and to prevent and solve crime; the people who work for this organization
Police officer
A person whose job is to stop fires from burning
Firefighter
