11.   The man who got out of it left the headlights full on and the engine running.

12.   I left the engine running and ran back to close the gate.

13.   I left the engine running.

14.   We told him to wait out front with the engine running.

15.   I kept the engine running because it might be necessary to leave fast.

16.   A big saloon car was parked outside the other door with its engine running.

17.   Leaving his engine running, I nipped back to the junction, hugging the side of a terrace house before peering round the corner.

18.   Their car is parked on our side of the road with its engine running.

19.   As they drove into the courtyard, she glanced at him in surprise as he kept the car engine running.