【小题1】Everyone in this town should_________________________(参加) cleaning the city up.
【小题2】Do you want your address written____________________________________(在......顶端) the letter?
【小题3】So together, our actions can______________________（发挥作用）．
【小题4】His eyes were open and everything he saw was____________(颠倒).
【小题5】Smoking_________________________(对......有害) your health. You must give it up.