1- Rivers are bigger than lakes.
2- The Mekong river is longer than the Red river.
3- Everest is the highest moutain in the world.
4- Hoa is the shortest girl in our class.
5- My mother is older than my teacher.
6- The Amazon River is the deepest river in the world.
7- The Summer is the hottest season in a year.
8- Nga and Lan are shorter than Minh.
9- My mother is younger than my father.
10- Ha Noi is smaller than Ho Chi Minh city.
11- This boy is taller than that boy.
12- A dictionary is thicker than a notebook.
13- The Great Wall is the longest structure in the world.
14- Buildings are higher than houses.
15- Lan is the happiest student in my class.
16- Our parents are the best people.
17- This girl is the thinnest in her class.
18- The winter is the coldest season in a yea.
