1.London is the smallest of the 3 cities
2.My grandmother is the oldest person in my family
3.Apples are more expensive than oranges
4.The Red River is shorter than the Mekong River
5.This flat is the best
6.You mustn't go to school late
7.We must finish our homework now
8.Children should go to bed early
9.She has a short black hair
10.There are many tall buildings in our neighbourhood
11.The book is under the note book
12.The bus is behind the car
13.I like the bedroom most
14.Ha is more hardworking than Quang
15.Can you tell me something about your neighborhood?
16.In summer,Ving is cooler than Da Nang