Решение:
- 1. The Federation Towers is a complex of two skyscrapers. They are situated in the Moscow International Business Centre, which is known as Moscow City. The two skyscrapers are named Tower East and Tower West. Tower East has 97 floors. It is the second tallest building in Russia and Europe but it held the record for 3 years, from 18 December, 2014 to 7 October, 2017. Tower West was completed in 2008 and has 65 floors. The building is actively used as a high-rise structure for extreme sport lovers. The Tower was mentioned in the Guinness Book of Records in 2007. Currently, the 61st floor of Tower West is housed the highest restaurant in Moscow. Every day more than 1,500 people are visited its observation deck to have a bird's eye view of Moscow. A film about the skyscraper was made by the Discovery Channel in 2009.
Вывод:
Заполнены пропуски в тексте, выбранные варианты соответствуют грамматике и смыслу предложения.