Complete the questions with the correct comparative/superlative form of the adjectives in brackets, and then choose the correct answer.

1. Which is the heaviest of all land animals? A. The rhino B. The giraffe C. The elephant (Correct answer: C. The elephant) 2. Which river is longer than the Amazon? A. The Nile B. The Volga C. The Yangtze (Correct answer: A. The Nile) 3. On which continent is the coldest place on Earth? A. North America B. Antarctica C. Asia (Correct answer: B. Antarctica) 4. Which country is bigger in size than the USA? A. Russia B. Australia C. Brazil (Correct answer: A. Russia) 5. Which continent receives the least amount of rain every year? A. Europe B. Antarctica C. Asia (Correct answer: B. Antarctica) 6. Which European city is more populated than London? A. Moscow B. Rome C. Warsaw (Correct answer: A. Moscow)