The key to exercise solutions in chapter Module 7 - Civilisations & Science for the textbook On Screen B2+ - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Read the texts (A-C) and fill in the words: associated, aliens, extraterrestrial, ancient, floors, supernatural, release, sank, evidence, occurrences, disappearances, hit.
Which of the unexplained mysteries in Ex.1 is each text about?