QUESTIONS ABOUT THE SUBJECT AND OBJECT

https://www.esl-lounge.com/student/grammar/3g26-subject-object-questions.php

https://www.examenglish.com/grammar/A2_subject_and_object_questions.htm

https://www.espressoenglish.net/subject-and-object-questions-in-english/

https://wordwall.net/es/resource/5858894/subject-and-object-questions

https://wordwall.net/es/resource/33942690/subject-and-object-questions

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

https://www.englisch-hilfen.de/en/exercises/questions/form3.htm