Category: Games These are the two highest valued letters in "Scrabble". "Q" and ?

Questions

Which of the halogens is liquid at room temperature?

Completed in 1966, which is the world's largest opera house?

Who was the first American in space?

Which Himalayan hybrids of yaks and cows are invaluable to Scrabble players?

Name the first ship from which Gulliver was shipwrecked in 'Gulliver's Travels'?