No one in class 10A is better at math than Hung This new street is noisier than this street Hanoi is smaller than Ho Chi Minh city Going by bus is cheaper than driving a car No students are prettier than Hoa The black car is more expensive than the white car My hair is as long as Lan's hair Life in the countryside is cheaper than life in the city The dog runs slower than the lion I dance worse than my sister That apartment is smaller than this apartment Red River is shorter than the Mekong River The air in the city is not as clean as the air in the countryside The birds flies lower than the planes