1. 根据句意和汉语提示填写单词。

1. （1） Let's  (欢呼) for our soccer team.

3. （2） Can you write down these  (通告) on the wall?

5. （3）  (几个) of us want to volunteer in the hospital in summer.

7. （4） The look of  (愉快) on her face shows that she has won the game.

9. （5） We have put up this  (标志) of "danger" by the lake.