Iv. fill in the definite article the if needed. 1. … volga runs into … caspian sea. 2. … pacific ocean is very deep. 3. … kazbek is the highest peak of … caucasus mountains. 4. i have never been to … lake onega. 5. … washington is the capital of … united states. 6. … europe and … america are separated by … atlantic ocean. 7. … shetland islands are situated to the north of … great britain.