Demonstrate with a large copy.
Round One have the students fill in the blank with the same word. For example 'Have you been to the moon'. Generally make it something impossible or at least unlikely. Then they pick one of the three choices and circle it. This is their answer or their ship.
Make a pair and play rock paper scissors. The winner goes first asking their partner a question. For example 'Have you been to the moon once?'. If that is the circled word then they answer 'Yes' and then sign their partner's ship. They are then finished so they say 'thanks, bye' and find a new partner.
If that answer is not circled then the answer is 'No' so the other student now has a chance. That student asks and if they get a 'yes' answer they get their sheet signed and they part company. If get a no answer then they switch again. Continue until somebody gets a yes answer.
Once they collect three signs they sit down. Once a few students are sitting down end the round. Have everyone sit down and give them the key word for the next round.
The weather version I use the keywords 'on Sunday' and 'this weekend'
The other one I use 'the moon' 'a snake' and 'a ghost'