http://www.englishgrammarsecrets.com/questions2/menu.php
here are some more exercises on the same (collection of an ace writer):
http://learnenglish.britishcouncil.org/en/quick-grammar/reported-questions
http://www.englisch-hilfen.de/en/exercises/reported_speech/questions.htm
http://downloads.bbc.co.uk/worldservice/learningenglish/grammarchallenge/pdfs/gc_44_reported_questions_quizzes.pdf
http://speakspeak.com/english-grammar-exercises/intermediate/word-order-in-questions-and-indirect-questions
Many thanks!
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here are some more exercises on the same (collection of an ace writer):
http://learnenglish.britishcouncil.org/en/quick-grammar/reported-questions
http://www.englisch-hilfen.de/en/exercises/reported_speech/questions.htm
http://downloads.bbc.co.uk/worldservice/learningenglish/grammarchallenge/pdfs/gc_44_reported_questions_quizzes.pdf
http://speakspeak.com/english-grammar-exercises/intermediate/word-order-in-questions-and-indirect-questions
Many thanks!