据句意及单词首字母完成句子。

1. He is h       , so he will pass the exam.

2. Students are s         to keep the classroom clean.

3. She didn't r            home until 11:00. 

4. L        , he found his book that he had lost.

5. To my s           , Tom did come to the party.

政治参与的方式有（）

A.政党活动

B.公民选举

C.公民复决

D.游行示威