Complete the sentences with the correct form of comparatives or superlatives of the adjectives.
1. The Great Wall of China is the world’s (long) ___________________ structure.
2. The Me Kong River is (long) ___________________ than the Red River.
3. Mexico City is (big) ___________________ than Tokyo.
4. Ho Chi Minh City is the (big) ___________________ city in Viet Nam.
5. China has the (big) ___________________ population in the world.
6. The Nile River is the (long) ___________________ river in the world.
7. Fansipan is the (high) ___________________ mountain in Viet Nam.
8. Buri Khalifa in Dubai is the world’s (tall) ___________________ building.
9. Russia is the (big) ___________________ country in the world.
10. Petronas Twin Towers in Kuala Lumpur is (tall) __________ than Sears Tower in Chicago.