问题补充：
Seeing from the foot of the mountain, clouds are seen beautifully over its top.
A. hung
B. hanged
C. hanging
D. being hung
答案：
A. hung
B. hanged
(答案→)C. hanging
D. being hung
解析：考查非谓语动词。句意：从山脚上看，看见白云优美的漂浮在它的顶部。现在分词表示正在进行的伴随性动作，和句子主语是逻辑上的主谓关系。Cloud是hang的主动动作，故选C。
