A2 Unit 4 Mysteries

https://elt.oup.com/student/champions/level03/level03_grammar/grammar_unit05_02?cc=pe&selLanguage=en

http://www.examenglish.com/grammar/A2_past_continuous.htm

http://absolutenglish-972.pagesperso-orange.fr/notes/mysteries/vocabulary_matchexo1.htm

https://learnenglish.britishcouncil.org/en/word-street/murder-mystery-scene-1

http://www.tolearnenglish.com/free/text/archives/agatha.htm