2. Underline the correct modals verb SHOULD / CAN / MUST / HAVE TO / MAY

1. Parents CAN ‘T/DON'T HAVE TO park their cars in front of the school gates.
2. You MAY/HAVE TO ask for permission to leave the classroom.
3. CAN/ SHOULD I help you?" the shop assistant asked.
4. She HAVE TO/MAY come to us whenever she likes.
5. They CAN/ MUST skate at the fixed time.
6. When you are ill, you MUST/SHOULD follow doctor's advice.