Misc: Who invented a screw which lifts water to a higher level?

Questions

In 1980 Polish airliner crash kills all ---------- aboard (22 are US amateur boxers).?

In 1983 ---------- cut oil prices for the first time in 23 years.?

In 44 B.C. Julius ---------- slain?

In 1913 Woodrow ---------- holds the first Presidential Press Conference.?

In 1926 Jerry---------- , French god, American humanitarian, comedian, actor, born.?