`1.` Yesterday I fell running and I think I ___________ my ankle. A. may sprain B. might sprain C. must have sprained D. might have sprained `2.` The light in Scot's room is on. He ___________ computer games. A. must play B. must be playing C. may play D. may be playing `3.` Sarah ___________ at the moment ~ I see her in the garden every morning. A. can't be working B. can't have worked C. may not work D. mightn't be working