countable and uncountable nouns

Practice countable and uncountable nouns.
http://www.myenglishpages.com/site_php_files/grammar-exercise-countable-uncountable-nouns.php
http://a4esl.org/q/j/ck/ch-countnouns.html
http://www.1-language.com/englishcourse/unit9_grammar_exs.htm

http://www.kico4u.de/english/uebungen/paitcher/countable.htm
Drag (=ziehen) the words into the corect box - countable or uncountable?