Comparison with noun

Comparison with noun :

1. Does a mango contain more sugar than an apple ? ( less )

2. I spend more time watching tv than my younger sister does . ( less )

3. People in developed countries use more money on health care and education than in underdeveloped countries ( don't )

4. Are there more health centres in my city now than ten years ago ? ( fewer )

5. There are more wealthy people in big cities than in the countryside ( fewer )

6. The standards of living in the cities shows more improvements than in rural areas . ( much )