Airport: Plane, travel, luggage, flight
Movie: Watch, cinema, popcorn, actor
Volunteer: Help, unpaid, organization, work
Environment: Nature, pollution, earth, protect
Career: Job, future, work, profession
Advertisement: Product, TV, sell, commercial
Opinion: Think, believe, idea, agree, essay
Tradition: Culture, custom, history, celebrate
Challenge: Difficult, problem, face, overcome
Schedule: Plan, time, calendar, organize
Experience: Life, event, past, learn
Factory: Machines, workers, products, build
Culture: Language, tradition, country, people
Transportation: Bus, train, travel, car
Population: People, country, number, grow
Risk: Danger, chance, decision, safe
