在下列各句的空白处填入一个最恰当的单词。
1. I opened the box quickly, but it was _____ .
2. I hadn't taken the keys with me, so I _____ myself out.
3. Don't be nervous! Jump _____ the sand.
4. You can't _____ her. She's much too clever for that.
5. My grandfather is a _____. He has a big farm.
6. Henry didn't _____ until he was over fifty years old.
7. The cartoon Snow White has a happy _____.
8. Children in the USA have a _____ party on Halloween ( 万圣节).
9. All the frightened people_____ from the fire.
10. Can you give me a _____ of paper?
