21.   We were bumping along a dirt road when a storm gathered dark clouds above us.

22.   Lightning flashed among the distant dark clouds.

23.   A dark cloud of bees comes swarming out of the hive.

24.   Dark clouds moved quickly across the sky.

25.   Dark clouds of smoke were coming from the windows.

26.   With the dark clouds moving in, rain seems more like a probability than a possibility.

27.   You see this dark black cloud hovering over the surface of Earth?

28.   Dark clouds now covered the sky and what could be seen of the harbour was a study in greys, slate blues and silver.

29.   Strewth, this all sounds a tad highbrow for a group who persistently hanker after the pleasures of life rather than moan about dark clouds on the horizon.

30.   It was much later when, as she lay contentedly against his heart, a dark cloud suddenly appeared on her golden horizon.