Countables uncountables

https://www.curso-ingles.com/aprender/cursos/nivel-basico/nouns/countable-and-uncountable-nouns

https://www.google.com.mx/url?sa=t&source=web&rct=j&url=https://agendaweb.org/grammar/countable_uncountable-exercises.html&ved=0ahUKEwis_bX_8JjXAhUqqFQKHc9UAJoQFggcMAA&usg=AOvVaw0jYLWaVswgXksUcJb2gjo6

https://www.google.com.mx/url?sa=t&source=web&rct=j&url=http://www.myenglishpages.com/site_php_files/grammar-exercise-countable-uncountable-nouns.php&ved=0ahUKEwjL-Zqe2ZjXAhWGLyYKHcVdDE8QFggfMAA&usg=AOvVaw2zEmZb6qh-qgEomOzYBPpK