QUESTION WORDS

http://www.englisch-hilfen.de/en/exercises/questions/question_words2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2066

http://first-english.org/english_learning/english_beginners/questions_exercises/a_questions_with_question_words.htm

http://anasenglishactivities.blogspot.com/2009/01/question-words-partculas-interrogativas_26.html