What is the name of the river that flows through the capital city of Russia?

What river flows through the city of Rome?

What is the name of the river that forms the border between the United States and Canada?

Which river is the longest in Europe?

Which river is the deepest in the world?

Which river is known as the "Yellow River"?

Which is the longest river of Asia?

What river forms the border between Argentina and Uruguay?

Asia's longest river is ________km long.

What is the length of Nile River?