Vcoabulary 4 Unit 3
Dentist : a person whose job is treating people's teeth
Noun You should have your teeth checked by a dentist at least twice a year.
Electrician : a person who puts in, checks, and repairs electrical wires and electrical equipment
Noun The electrician has diagnosed a fault in the wiring.
Emergency something dangerous or serious, such as an accident, that happens suddenly or unexpectedly and needs fast action in order to avoid harmful results
Noun How would disabled people escape in an emergency?