2. Underline the correct modal verb

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