unit 1 save our planet
unit 2 across generations
unit 3 health
unit 4 employment
unit 5 is now a terrible time to be young?
unit 6 love and marriage
unit 7 transport
unit 8 social problems
unit 9 prejudice and discrimination
unit 10 digital era
unit 11 people with exceptionalities
unit 12 crime and punishment
unit 13 mass media and society
unit 14 credit system and honesty
unit 15 communication and socialization
unit 16 language and culture
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