Complete the sentences below using the correct form of comparative or superlative adjectives.
9. Nile River is ……………………………… river in the world. (long)
10.This book is ……………………………… of these books. (interesting)
11. Ho Chi Minh City is ……………………………… city in Viet Nam. (big)
12.They are ……………………………… students in my class. (good)
13.These houses are ……………………………… in the village. (beautiful)
14.Winter is ……………………………… season in the year. (cold)
15.Airplane is ……………………………… means of transport. (fast)