They went to Great Britain three years ago. Did they go to Great Britain three years ago? (General question) Who went to Great Britain three years ago? (Special question) They went to Great Britain three years ago, didn't they? (Tag question) Did they go to Great Britain or the USA three years ago? (Alternative question)
Did they go to Great Britain three years ago? (General question)
Who went to Great Britain three years ago? (Special question)
They went to Great Britain three years ago, didn't they? (Tag question)
Did they go to Great Britain or the USA three years ago? (Alternative question)