1 Even the walls have ears.
2 Hedges have eyes, and walls have ears.
3 Pitchers/Walls have ears.
4 Walls have ears.
5 Be careful what you say; even the walls have ears!
6 Not so loud. Walls have ears.
7 Hedge have eyes and walls have ears.
8 Hedges have eyes, walls have ears.
9 Walls have ears, you know.
10 The walls have ears, so be careful about what you say.
11 Shall I come to your hotel? Better if we meet in the Park. Walls have ears.