题目内容：

A. 用方框中所给单词的适当形式填空, 每词仅用一次, 每空一词。

  polite    health    sleep   oneself   twenty

1.I fell _________ while reading English. Luckily, my deskmate woke me up in time.

2.It is _________ of you to point at others with chopsticks when eating.

3.March 3rd is my sister’s __________ birthday.

4.Doing more exercise can help us stay __________.

5.Mrs. Black has lots of money. But she doesn’t enjoy__________.