https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises
https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple
https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm
https://www.ecenglish.com/learnenglish/lessons/present-perfect-quiz
https://www.curso-ingles.com/practicar/ejercicios/already-just-still-yet
https://elt.oup.com/student/englishfile/preint/a_grammar/file04/grammar04_b01?cc=us&selLanguage=en
http://www.esl-lounge.com/student/grammar/2g7-just-yet-already.php
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