Misc: In greek mythology, whose companions were the argonauts?

Questions

In what do monotheists believe?

Who sang All night long at the 1984 Los Angeles Olympics closing ceremony?

What stands on top of the cactus on Mexicos flag?

Of what has Ry Cooder only one,that most men have two?

What name beginning with G was given to the hurricane that caused major devastation in Jamaica during 1988?