1/ I think UFOs might be the ___________ of people. ( imagine) 2/ There is no __________ that they have been there. ( evident) 3/ There may be a lot of __________ stones in Mars. ( preciosity) 4/ Many reports talked a lot about the __________ of UFOs . ( appear) 5/ It was a really _________ football match. (excite) 6/ You have had to make a difficult _________ . ( decide)