KET question formation exercises

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

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-62673.php

http://www.myenglishpages.com/site_php_files/grammar-exercise-wh-questions.php

http://www.englishexercises.org/makeagame/viewgame.asp?id=1718

http://www.perfect-english-grammar.com/indirect-questions-exercise-2.html

http://www.e-grammar.org/indirect-question/test1-exercise1/

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-80362.php