A: I scream. (Ice cream)
Q: Where does a ghost mail his letters?
A: At the ghost office. (Post office)
Q: What did the ghost mail home while on vacation?
A: Ghostcards. (Post cards)
Q: What amusement park ride does a ghost like best?
A: The roller ghoster. (Roller coaster)
Q: What do you say to a ghost with three heads?
A: Hello, hello, hello.
Q: What's the difference between a ghost and a butcher?
A: One stays awake and the other weighs a steak.