ZERO CONDITIONALhttps://www.perfect-english-grammar.com/zero-conditional-exercise-1.htmlhttps://elt.oup.com/student/solutions1stedition/preint_unit_page/unit6/grammar/exercise2?cc=global&selLanguage=enhttps://elt.oup.com/student/solutions/preint/grammar/grammar_06_022e?cc=global&selLanguage=en
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