Completar Frases Modals of possibility and/or certainty (1)Versión en línea Students have to select the right modal to complete the sentences. por Sarah Muyshondt 1 could may must might can Tourists be certain to see the Crown Jewels at the Tower of London . 2 might must could can may The restaurants in the city be open today , it is Saturday ! 3 can may could might must Tourists prefer to go by foot rather than using the London Underground . 4 might must may can could People who are afraid of heights , not want to visit the Big Ben . 5 might can could may must Some people be annoyed when you ask them to take a photo of you in front of Westminster Abbey .