Use "prick up" in a sentence

1. He said, with just a touch of sang-froid to make Doc prick up his ears

2. You’ve got Harvey and his men who might prick up if they discover your existence

3. Mrs X, you are going to feel a little prick up here

4. In the meanwhile I prick up my ears, but there’s nothing to be heard

5. "Why comical?" Porfiry Petrovitch had turned to go, but he seemed to prick up his ears at this

6. The sentence that caused Gwenda to prick up her ears

7. Montfermeil! that name was always coming up, and it made Javert prick up his ears

8. ‘Why comical?’ Porfiry Petrovitch had turned to go, but he seemed to prick up his ears at this