Read the text. Choose the best option to complete each gap.

Lake Baikal is the deepest lake in the world and contains about 20% of the world's fresh surface water. It is located in southern Siberia, Russia. Many years ago, people animals there, including the Baikal seal. In the future, even more tourists Baikal to see its clear water and beautiful nature. In winter, the lake is covered with thick ice. When the ice in spring, people can see clean water. Baikal

Ответ: the, deepest