11.   Those black clouds are a sure sign of rain.

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

13.   In many areas of the country black clouds had completely blocked out the sun, and noxious gases were making normal life impossible.

14.   He saw them, although the ones he witnessed were different from the black clouds he had heard about.

15.   These produced a thick black smoke cloud, dense enough to obscure the sun in Kuwait, northern Saudi Arabia and southern Iraq.

16.   In August, a trial burning produced a corrosive black cloud which caused damage worth millions of pounds to new cars stored nearby.

17.   There was a great black cloud hovering over her head.

18.   Usually she managed to keep the looming black cloud of misery at bay, but there were times when her thoughts would drift away and her eyes would mist.

19.   But you go to the middle of nowhere and Nicky would look up to see a black cloud on the horizon and ask what it was.