https://www.ego4u.com/en/cram-up/grammar/reported-speech
https://www.englisch-hilfen.de/en/exercises_list/reported.htm
https://www.e-grammar.org/reported-speech/test1-exercise1/#topad
https://www.myenglishpages.com/site_php_files/grammar-exercise-reported-speech.php
https://www.perfect-english-grammar.com/reported-speech-exercises.html