4a Work in groups of four. Do the quiz. 1 Which is the world's smallest continent?
2 Which continent has the world's highest mountains?
3 Which continent has the most countries?
4 Which is the planet's longest river?
5 What is the planet's biggest lake?
6 Which is the world's smallest country?
7 Which is the country with the largest population?
8 Which is the world's largest country?