Вставьте артикль the, где это необходимо:

1. Russia is washed in the north by … Arctic Ocean and its seas: …Barents,
…Kara, …Chuckchee, …Bering Sea, …Laptev and …White Sea.

2. The size of Russia is hard to imagine. A flight from …Moscow to
…Magadan takes eight hours.

3. Russia is a land of long rivers and large lakes. The three mighty
Siberian rivers are …Ob, …Lena and …Yenisei.

4. The three largest lakes in Russia are …Baikal in South-Eastern
Siberia and …Ladoga and …Onega in Northern Russia.

5. There are three main mountain ranges in Russia. …Caucasus
stretches from the Black Sea to the Caspian Sea.

6. The highest mountain is …Mount Elbrus.