music: 80's Chart Toppers: Name The Artist: Romeo's Tune?

Questions

In 'la traviata', what does violetta sing?

In 'la traviata', who sings 'sempre libera'?

In 'my favourite martian', who did ray walston play?

In 'romeo and juliet', about what was mercutio's long monologue?

In 'romeo and juliet', who said 'i have a faint cold fear thrills through my veins'?