UNIT 1 (A new buddy next door) UNIT 2 (Who to invite?) UNIT 3 (Did you ever post mean comments online?) UNIT 4 (Big City Small World) UNIT 5 (Don’t Worry, I’ll Get Used to It!) UNIT 6 (Let’s Give Them 5 Stars!) UNIT 7 (Constructive Criticism) UNIT 8 (Living on Mars) UNIT 9 (Suggesting Idea) UNIT 10 (Giving Opinion) UNIT 11 (Dream Job) UNIT 12 (The Theory of Evolution) UNIT 13 (The Benefits of Smiling) UNIT 14 (People Pleasure) UNIT 15 (Net Neutrality) UNIT 16 (Learning Languages)