Unit 1 Communication Unit 2 Music Unit 3 Economics Unit 4 Investment Unit 5 Culture Unit 6 Politics Unit 7 Automobile Engineering Unit 8 Sports Unit 9 Tourism Unit 10 Foreign Trade Unit 11 Philosophy of Life Unit 12 Film Appreciation Unit 13 Management Unit 14 Internet Technology Unit 15 Material Science Unit 16 Shipping Engineering Unit 17 Civil Engineering Unit 18 Environmental Engineering Unit 19 Art Unit 20 Language