1. May
2. Can; must
3. May
4. Can
5. Must
6. Can
7. Can't
8. Must
9. May
10. Can
1. I must read this book.
2. She's may read this book
3. -
4. They're may play in garden
5. I must be go to chemist buy medicine
6. She's may go to chemist
7. They must talk with her
8. They're may talk about this.
9. -
10. She's may write to sister.