Misc: in what year did agatha christies play the mousetrap open in london?

Questions

In 1985 Live Aid, a rock concert in London, Phila, Moscow and---------- . ?

In 1789 Bastille Day-citizens of Paris storm ---------- prison. ?

In 1832 ---------- exempted from federal tariff duty. ?

In 1850 1st public demonstration of ---------- made by refrigeration. ?

In 1857 ---------- invented the washing machine. ?