11.   The pipes in the attic gurgle in the night and keep me awake.

12.   The sound of her sobbing kept them awake all night.

13.   The whirring of our locust jaws is what keeps you awake.

14.   Their late-night shouting match was so noisy it kept staff awake.

15.   These terrifying thoughts sometimes kept me awake for hours.

16.   They kept us awake with their late-night parties.

17.   They were kept awake by loud music from next door.

18.   To keep themselves awake they sat on the floor and told each other stories.

19.   We were kept awake by the continual buzz of small planes overhead.

20.   He was kept awake by a mosquito, which was buzzing around his hotel room all night.