междометие «О!» в англ. пишется следующим образом: «Oh!».
About answer: as stated above, to keep silence is impassible for such achievement in «science of EGO‑life» as me… So, I just can say to you: f**k off.
It is an answer, isn't it?.... :)
And for the future: use LINGVO dict. if u r not qualify quite enough