Form 7a. Countable and uncountable nouns

For beginners: http://easyandquickenglish.wordpress.com/activities/grammar/hoja-2/
Grammar exercise 1: http://learnenglish.britishcouncil.org/en/grammar-exercises/countable-uncountable-nouns-1
Grammar exercise 2: https://learnenglish.britishcouncil.org/en/grammar-exercises/countable-uncountable-nouns-2