1. I'd like a few hours of quiet after the day's work.

2. Monrovia after the fighting is eerily quiet.

3. The city was preternaturally quiet.

4. She remained quiet and controlled.

5. The wind quieted down.

6. She lay quiet.

7. The sea was quiet before the storm struck.

8. Mother quieted the frightened child.

9. Be quiet, please.

10. The classroom is quiet.

11. He is never quiet. He can't stop talking.

12. Your brother needs peace and quiet because he's working.

13. When the teacher walked in the room, all gossip stopped and suddenly the class became so quiet.

14. This place is so quiet that I feel frightened.

15. Juan sat quietly through the telling of this saga.

16. He walked very quietly.

这些句子涵盖了quiet作为形容词和动词的不同用法，并且适合四年级学生的理解水平。