Misc: What number is represented in Morse code by five dots?

Questions

In 1985 Space shuttle ---------- makes second flight, carries 7 (1 Mexican). ?

In 1520 ---------- begins crossing the Pacific Ocean. ?

In 1776 Washington and his troops cross the ---------- River. ?

In 1895 America's first ---------- race starts; 6 cars, 55 miles, winner averages a blazing 7 MPH. ?

In 1943 Roosevelt, Churchill and Stalin met at---------- . ?