1. The boys like to listen to music when they do ____ (they) homework.
2. My mother's work is ____ (make) our city safe.
3. One day, Mr Green asked Mrs Green       _ (go) shopping with him.
4. We would brush our ____ (tooth) twice a day.
5. This book is the lightest and          (thin)  of all the books.
6. She is ____ (good) than Alice at swimming.
7. Janet ____ (get)  up at 7:30 am every day, so she is always late for school.
8. I think the ____ (four) lesson is the most difficult in this book.
9. Look at the sign. The library is ____ (close) from 1:00 pm to 2:00 pm.
10. Jason is used to          (watch) TV the whole night.