B2.1 Modality II

Mixed modals: https://agendaweb.org/verbs/modals-mixed-3-exercises.html

Deduction about the present: https://learnenglish.britishcouncil.org/grammar/intermediate-to-upper-intermediate/modals-

Present and past speculation and deduction: https://test-english.com/grammar-points/b2/speculation-deduction/