根据句子意思，用括号中所给单词的适当形式填空。

1. Our school becomes quiet and _______ (peace) after children leave.

2. Sandy organized a charity show _______ (success) last year.

3. Bill was feeling sad. He told me about his _______ (happy).

4. ______ (sleep) in a blue room is good for your mind and body .

5. Simon just forgot when ______ (meet) his friends

6. Wearing red can help when you are having difficulty ______ (make) a decision.

7. You'd better give up _______ (smoke), it's bad for your health.

8. A year is _______ (divide) into 12 star signs in western countries.

9. Andy is _______ (energy) enough to be a leader.

10. It is silly of you _______ (not forgive) others for their faults.