1)He/happy/his sister 2)History/difficult/Maths 3) Cable TV/good/Satellite TV 4) Watching TV/important/doing homework 5) My sister and my brother/tall/me 6) Dubai/big/Paris 7) My mother/old/my father

He is happier than his sisterHistore is more difficult that MathCable TV is better than SatelliteWhatching TV is more important than doing homeworkMy  sister and my brotherare taller than meSubai is bigger than ParisMy mother is older than my father