根据句意和汉语注释，写出单词的正确形式。

1. All the _____ here are very good. But the best is the one made in Japan. (收音机)

2. — How can I be a _____ of your club? (成员)   

    —You just need to be ready to help others.

3. In my class, most boys like watching football _____ on TV. (比赛) 

4. Look! There is a football game on one of the football _____ in our school now.  (场地)

5. It's good for us to do morning _____ between classes. (锻炼)