1. 根据句意及汉语提示完成句子，每空一词。

1. （1） Everyone in this town should    (参加) cleaning the city up.

3. （2） Do you want your address written     (在.……顶端) the letter?

5. （3） So together, our actions can   （发挥作用）.

7. （4） His eyes were open and everything he saw was   (颠倒).

9. （5） Smoking    (对……有害) your health. You must give it up.