5. Fill in the definite article the if needed.

1. the Volga runs into the Caspian Sea.
2. The Pacific Ocean is very deep.
3. The Kazbek is the highest peak of the Caucasus mountains.
4. I have never been to Lake Onega.
5. Washington is the capital of the United States.
6. Europe and America are separated by the Atlantic Ocean.
7. The Shetland Islands are situated to the north of Great Britain.