Which war ended with an armistice in November 1918?

What is it called when two couples go out together for an evening? A former DuPont chemist from New Hampshire introduced which brand of food storage containers in 1946? Which lively Spanish dance shares its name with a famous 1928 orchestral work by Maurice Ravel? What is an excess of revenues over expenses called in business? What is an exclusive news story for a reporter called? An executive order dated November 29, 1963, created which investigative body? What is an expensive vessel used for pleasure cruising or racing called, from a Dutch word for "hunt"? In 1985, astronaut Sherwood Spring left which kind of spacecraft to perform spacewalks testing construction in space?