...... Danube flows through Bratislava as well as Vienna.

...... Vah is a well-known Slovak river.

A whale has once been seen swimming in ...... Thames.

There's a large number of manufacturing businesses situated around ...... Rhine.

Has there ever been an expedition to ...... Potomac River?

...... Suez Canal is a very popular tourist destination.

A big ship has sunk in ...... Erie Canal.

...... Pacific Ocean is the largest ocean in the world.

My grandparents have just bought a lovely cruise around ...... Atlantic.

...... Indian Ocean washes upon southern Asia.

...... Southern Ocean encircles Antarctica.

...... Arctic Ocean washes upon northern North American and Eurasia.

...... Nile is considered the longest river on Earth.

...... Amazon is approximately 4,000 miles long.

The longest river in Asia is ...... Yangtze.