Underline the correct modal verbs. 1. You can / **must** raise your hand and wait before you ask a question. 2. In the old days, teachers **could** / should hit students with a ruler if they misbehaved in class. 3. In certain schools, students may / **must** stand when their teacher enters the room. 4. Steven wants to go out but his mum said he **needn't** / can't go until he has finished his homework. 5. We **need** / mustn't to decide who will be class president. 6. I didn't see Bill today, he **should** / must have taken the day off. 7. Kate looked pale in the doctor's office. She **may** / might be ill. 8. In Britain, all teens **have to** / may stay in school until they are 16 years of age. 9. You **should** / might spend time studying if you want to get good marks. 10. "Can / **May** I leave early today, please?" Sarah asked.