COUNTABLE AND UNCOUNTABLE NOUNS

http://www.englisch-hilfen.de/en/exercises/confusing_words/some_any.htm

http://www.ego4u.com/en/cram-up/vocabulary/little-few/exercises?03

http://saberingles.com.ar/curso/lesson07/08.html

http://www.ejerciciodeingles.com/ejercicios-expresiones-cantidad-a-lot-of-much-many-rellenar-huecos/