used to/would
https://elt.oup.com/student/solutions/upperint/grammar/grammar_02_012e?cc=ee&selLanguage=en
https://test-english.com/grammar-points/b1-b2/would-and-used-to/
present perfect
https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises
https://www.examenglish.com/grammar/A2_present_perfect.htm
present perfect continuous
http://www.focus.olsztyn.pl/en-present-perfect-continuous-test.html
https://www.eltbase.com/quiz/151_01.htm
past simple/past continuous
http://digitalcampus.free.fr/Level2/Unit21/SubUnit211/BirdHopped01.jqz.htm
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex04
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