music: 50's Chart Toppers: Name The Artist: It Was I?

Questions

Although modern images of India often show poverty and lack of development, India was the richest country on earth until the time of British invasion in the early ---------- Century.?

American astronauts must be under ---------- feet.?

Antarctica has no native---------- .?

Antarctica's residents are ---------- and support staffs who usually stay no more than a year at a time.?

Antarctica's residents are scientific and ---------- staffs who usually stay no more than a year at a time.?