题目内容：

A．根据汉语提示，用单词的正确形式填空，每空一词。

1.Cats and mice are always natural ________(敌人)

2.Look at the dark clouds in the sky. It will rain ________(今夜).

3.We are having a party to celebrate Miss Yang’s __________(第二十个) birthday.

4.Please don’t ___________(惩罚) him. He is only a child.

5.All of us took part in the sports meeting __________（包括）some young teachers.

6.The bottle is _________(空的). Please give him another bottle of milk.

7.________(刷) teeth before going to bed every night is good for your health.