Plurals

https://www.mes-games.com/plural1.php

https://www.ejerciciosinglesonline.com/new-exercises/ex1-plural/ 

https://www3.gobiernodecanarias.org/medusa/ecoblog/fpelmel/carrera-de-plurales-en-ingles/

https://www.eslgamesworld.com/members/games/ClassroomGames/Billionaire/Plurals%20Billionair%20Game/index.html