Read the text and fill in the gaps with the right phrases. There are is ONE EXTRA phrase you don’t need to use.

Ice Diving
Lake Baikal in Russia is not only the world’s oldest and deepest freshwater lake, ... . It is truly an amazing place of natural beauty and biodiversity and it is the dream of many divers. The lake is host to 1085 species of plants and 1550 species and varieties of animals ... .
However, the attraction here is not only the marine flora and fauna as many of it is very small or almost invisible. Divers come to Lake Baikal to see the beauty of the ice ... . They need to prepare their dives carefully though because diving under sheets of ice can be very dangerous. ... you can't just surface anywhere you like. At Lake Baikal, divers cut a large hole in the ice as an entrance and exit point. ... that they can see from underwater. This will help them to find their way back to the hole. When they are sure everything is ready and safe, they dive into one of the most spectacular experiences in their life. Although some hobbies look rather unusual and even dangerous, ... . But everyone should be really careful.