useless trivia: What Word Means: To Sit Again?

Questions

History : John F. Kennedy Airport used to be called __________.?

History : Mussolini invaded this country in 1935.?

History : Name Jacques Cousteau's research ship.?

History : Name the incident in which tea was dumped into the harbour.?

History : One who fought professionally in Roman arenas was a(n) ____________.?