Reported questions

Here you have some links to practice reported questions. The last one is the most difficult one.
Good luck!

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

http://www.englisch-hilfen.de/en/exercises/reported_speech/questions2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=3764

http://www.perfect-english-grammar.com/reported-speech-exercise-2.html

http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/reported-questions.html

https://www.ego4u.com/en/cram-up/grammar/reported-speech/exercises?05