根据句意及首字母或中文提示，完成下列句子中的单词。

1. Betty is the less p_____ of the two girls, so we all vote for the other girl.

2. Don't tell it to others. It's a s_____ between you and me.

3. The death (死亡) of his pet made him even s_____.

4. The boy is _____ (几乎) late for school again.

5. My sister always _____ (面带) a smile on her face.

6. They spent a lot of time _____ (练习) the piano every week.

7. Can you tell me about some national _____ (英雄) in Chinese history?

8. Is there any difference between _____ (英国的) English and American English.

9. He thinks one of his _____ (糟糕) subjects is Art.

10. I can see the birds far away because of my wonderful _____ (视力).

A．无限制

B．300个

C．1024个

D．100个