https://www.macmillandictionary.com/learn/language-quizzes/dogs.html
Tag: B1
indirect questions
auxiliaries A2
relative clauses
Passive Voice B1
http://www.english-grammar.at/online_exercises/passive-voice/pa007-active-passive.htm
http://www.english-grammar.at/online_exercises/passive-voice/pa006-active-passive.htm
http://www.english-grammar.at/online_exercises/passive-voice/pa001-passive-voice-sentences.htm
http://www.english-grammar.at/online_exercises/passive-voice/pa011-active-passive.htm
http://digitalcampus.free.fr/Level3/Unit32/SubUnit321/PassiveConversion01.jcl.htm
http://www.english-grammar.at/online_exercises/passive-voice/pa010-active-passive.htm
https://www.ecenglish.com/learnenglish/lessons/making-passive-sentences
reported speech B1
great human rights fighters
https://www.youtube.com/watch?v=VZEKt2ApHdM