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1. What is the longest river in Europe?
The longest river in Europe? Uh… Is it the Danube?
No. Guess again.
I have no  . Can you give me a hint?
It starts with a V.
It begins with a V? Oh, oh, the Volga!
That′s right. The Volga is the longest river in Europe. It is over 3,200 kilometers  .

What is the biggest forest in South America?
Oh, come on! That′s too  .
Oh yeah?
Of course. Everybody knows it′s the Amazon.
That′s right. It′s the Amazon rainforest. It′s over 3.5 million square kilometers.

So, what is the   continent on earth?
Continent? It′s not Europe. It′s Australia.
That′s right. Some people even consider it the   island in the world.
Wait, isn′t Greenland the largest island in the  ?
Well, Greenland is   2.2 million square kilometers. Australia is 7.7 million square kilometers.