1. I was born in a small v______. 
2. The air was f______ with laughter. 
3. Autumn was the h______ season. 
4. If it snowed, we would rush out to make s______ 
5. My childhood is u______, I will never forget it. 
6. In winter, we stay i______ most of the time. 
7. We often swim and have water f______ in the river. 
8. Chinese are p______ of the Great Wall. 
9. Lily is b______ with her work. 
10. She does her b______  to study English, because it's very important.