Tigers were the favorite animal of Leslie but not Kyle, so 
OPTIONS:
- Leslie spent their time at the zoo watching the tigers.
- Kyle spent their time at the zoo watching the tigers.
Leslie spent their time at the zoo watching the tigers.

Justin spent less on dog food than Eric because 
OPTIONS:
- Justin had a puppy dog at their house.
- Eric had a puppy dog at their house.
Justin had a puppy dog at their house.

Mary is a professional gambler, Erin never gambles therefore 
OPTIONS:
- Mary would not be able to give instructions on how to play the game of poker.
- Erin would not be able to give instructions on how to play the game of poker.
Erin would not be able to give instructions on how to play the game of poker.