根据汉语提示完成句子。

1. ______ (自信的) people aren't afraid to speak in public.

2. She taught                (她自己) English.

3. Don't __        _ (打扰) others when they are doing something.

4. The boy is not tall enough to reach the books on the ___      _ (书架).

5. Mr Wang is really                (有帮助的). He is always ready to offer a helping hand.