Form 8b. Passive voice

For practicing:
https://www.englisch-hilfen.de/en/exercises/active_passive/active_or_passive1.htm;
https://www.englisch-hilfen.de/en/exercises/active_passive/active_or_passive2.htm;
https://www.englishgrammar.org/active-passive-voice-exercise-8/;
https://www.english-grammar.at/online_exercises/passive-voice/pa010-active-passive.htm;
https://www.english-grammar.at/online_exercises/passive-voice/pa007-active-passive.htm;
https://www.englisch-hilfen.de/en/exercises/active_passive/sentences_gaps.htm;
https://www.ego4u.com/en/cram-up/grammar/passive/exercises?06.
GRAMMAR QUIZ:
https://learnenglish100.com/passive-voice-quiz-english-online-exercises/.