Exercises modals

http://www.ecenglish.com/learnenglish/lessons/modals-deduction-present
https://elt.oup.com/student/naturalenglish/int/a_grammar/unit11/neint_grammar11_3?cc=tr&selLanguage=en
http://www.examenglish.com/grammar/B1_present_modals_of_deduction.htm