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?