Read the text and choose the appropriate words to complete the text.

Lake Baikal is one of the most beautiful ... on earth. Everyone who has been on its ... is impressed and charmed by its grandeur, size and unusual might. The wonder of the natural world is very difficult to ... .
The waters of the lake are amazingly transparent and they ... colours all the time. The water of the lake can ... be called warm. In summer its ... temperature is +12 degrees Celsius. But quite a lot of people risk having a swim in it.
The snows of Siberia come to Lake Baikal in early October. At the end of October the lake begins to ... .
In winter the ice gets very ... -well over a metre. In 1904, during the Russo-Japanese War, a railway ... was laid across the ice to carry guns to the front. By mid-April the ice begins to melt and the lake becomes so huge that ... and fishermen here talk of "going to sea".