adding dashes where needed

There was a loud boom -- what a fright from the back of the theater.

We all turned around -- I even jumped up to see what it was.

It was part of the play -- imagine that meant to add suspense.

I'd love to see the play again -- maybe next week -- and bring Andrea.

1 answer

The fourth sentence is correct.

Study this carefully and re-think the other sentences.
http://grammar.ccc.commnet.edu/grammar/marks/dash.htm