Fill in the Blanks (B1) Mystery and ConspiracyOnline version Part 2 - Fill in the blanks with the correct words. by Janaina - Mastery English Classes 1 wide around fascinating vehement Conspiracy theories catastrophic shape revolve crave Invasions somewhat wackiest shifting mystery array reptilians horrific Mysteries and Conspiracies Agatha Christie , a famous novel author , once famously said , " The simplest explanation is always the most likely . " However , when something shocking or happens in our lives , simple explanations just aren't enough . We deeper reasons and meanings , and sometimes we create our own . can attract a of people , from supporters to those who just like a good story . Whether they're believable or completely ridiculous , the most popular conspiracy theories are . Some of the most popular conspiracy theories the deaths of John F . Kennedy , Princess Diana , and Elvis . There are some other popular theories about 9 / 11 , Global Warming , and Alien . However , one of the theories says that most world leaders are actually - from a different planet who start wars and are responsible for events like 9 / 11 in order to promote fear and hatred , which gives them strength . Oh , and they're seven feet tall . Can you believe it ?