根据句意和首字母或汉语提示写出句中所缺单词，每空一词。
1. Zhijin Cave is known as the most beautiful underground _______ (宫殿) in the world.
2. Susan usually has some pieces of b_______ and a bottle of milk for breakfast.
3. In English the first name is the g_______ name.
4. Spring is the best time for p_______ trees.
5. — Excuse me. Are you f_______ now?
— Sorry, I'm very busy.
6. It's ten _______ (分钟) walk.
7. He _______ (使用) a lift to go up and down every day.
8. Food must be _______ (保存) in cool places in summer.
9. We often listen to our teacher _______ (认真) in class.
10. With the d_______ of computer science, more and more work will be done by computer.
