The international space station has been in orbit around (0) the Earth since 2000. During that time, it has (1) visited by hundreds of people of many different nationalities. Most say it was the best experience (2) their lives, even (3) living with strangers for (4) to six months and in (5) restricted living space is far from straightforward. Because things can (6) seriously wrong in space, cooperation between astronauts on the ISS (7) essential and, to ensure that tensions do not build up, astronauts go (8) intensive training to help them cope (9) potential future crises and to help them form good relationships . To prepare them for the loneliness they will feel in space, astronauts spend time in an isolated room (10) they can see nothing. вставить недостающие слова.