Underline the correct item. 1. Ann may/has to leave school early tomorrow. She has a dentist appointment after school. 2. If Ben gets permission from his parents, he may/ must study in France next year. 3. Kate should have/ must have studied a lot for the history exam. He got very high mark. 4. Students mustn't/ needn't run in the school corridors. It's against the rules. 5. You can/must raise your hand and wait before you ask a question.