in the front row at the ceremony our distinguished guests are from home and abroad.A. Se

问题补充：

in the front row at the ceremony, our distinguished guests are from home and abroad.

A. Seating

B. Being seated

C. Seated

D. To seat

答案：

A. Seating

B. Being seated

(答案→)C. Seated

D. To seat

解析：考察分词作状语。本题中的动词seat使…就座；这是一个及物动词，与后面句子的主语our distinguished guests构成被动关系，故使用过去分词在句中作状语。本句中的seated已经转换成形容词“就坐的…”；句意：坐在庆典前排的是我们来自国内外的尊贵的客人。故C正确。