1. Mai is more intelligent than Kien
2. My brother is stronger than my sister
3. Life in the city is more exciting life in the countryside
4. Ho Chi Minh city is bigger than Ha Noi capital
6. School days are the happiest of my life
7. The Mekong River is the longest river in Vietnam
8. Nam is shorter than Ba. He is the shortest in his class
9. Your house is the largest of three houses
10. It is the tallest building in this city

CHẤM ĐIỂM CHO MÌNH NHÉ! THANKS