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.