Misc: One quarter of the bones in your body are in your?

Questions

In 1979 Israel's parliament approved a peace treaty with ---------- .?

In 1981 Soyuz 39 is launched - First ---------- in space.?

In 1982 Third Space Shuttle Mission - ---------- is launched.?

In 1983 Chaim ---------- elected president of Israel.?

In 1743 George Frideric ---------- 's oratorio "Messiah" has its London premiere. ?