用所给词的适当形式填空。
1. You are a good _____ (listen).
2. What would you do if the teacher _____ (ask) you to give a speech?
3. The old man is very _____ (energy).
4. Don't be afraid _____ (speak) in the front.
5. The man is very _____ (confidence).
6. The coach asked the boy _____ (not run) too fast.