51.   Cycloramas had the idea of putting the visitor in the centre of the picture, as if viewing a panorama from a mountain top.

52.   The other is over snow-speckled mountain tops on a track that degenerates into a morass passable only by tractor.

53.   The team had already climbed several mountain tops in Iran this year, the paper added.

54.   Low cloud had obscured the mountain tops from below, and poor visibility meant nobody except the driver was travelling on the doomed car.

55.   The luxurious building is situated on a mountain top overlooking the sea.