music: 60's Chart Toppers: Name The Artist: At the Zoo?

Questions

1993 the year: china released this dissident, famous for tiannaem square massacre activity.?

1993 the year: this man became south korea's first civilian leader.?

1993 the year: this world leader visited denver, colorado for world youth day.?

advertising: bing crosby advertised this product.?

advertising: distinctive quality about mr. clean's head.?