Ćwiczenia:
- http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-27/session-2/activity-1
- http://www.englisch-hilfen.de/en/exercises/questions/question_tags2.htm
- http://www.englisch-hilfen.de/en/exercises/questions/question_tags3.htm
- https://www.ego4u.com/en/cram-up/grammar/question-tags/exercises
- http://www.perfect-english-grammar.com/question-tags-exercise-1.html
- http://www.grammarbank.com/question-tags-exercises.html
- http://www.grammarbank.com/tag-questions-exercise.html
- http://www.esl-lounge.com/student/grammar/2g16-question-tags-exercise.php