根据句意，用括号内所给单词的适当形式填空。

1. They will lose __________ (they) if they go down that path.

2. Jack is a __________ (honest) boy. He often tells lies.

3. The food smells __________ (terrible) bad, you won't like it.

4. Are you pleased with these __________ (dance) performances?

5. We held a party to celebrate our father's __________ (forty) birthday yesterday.