1.   Glancing surreptitiously around, she glimpsed knowing smiles and heads drawn close as people whispered.

2.   Harry, for his part, exchanged a knowing smile with Papaioannou, then went on in the direction of the village.

3.   I saw him give her a knowing smile as she left the room.

4.   Nate Cocello allowed a knowing smile to cross his face at what he knew would be the natural reactions of line managers.

5.   She exchanged a knowing smile with her mother.

6.   She wanted to smack him for his knowing smile.

7.   When Gwen gave a rather knowing smile, she blushed scarlet.

8.   You would have been forgiven for a knowing smile then, but now acid rain is no laughing matter.

9.   Ron gave her a knowing smile.

10.   She pulled away and scrambled back to her side of the seat, but not before he gave her a knowing little smile.