https://elt.oup.com/student/solutions1stedition/int_unit_page/unit2/grammar/exercise2?cc=bg&selLanguage=bg
http://www.esl-lounge.com/student/grammar/3g80-intermediate-past-simple-or-used-to-gap-fill-exercise.php
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-87374.php
http://www.esl-lounge.com/student/grammar/3g26-subject-object-questions.php
VOCABULARY
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