Once in a theater wearing 3D glasses you feel as though you are caught up in the story w

问题补充：

Once in a theater wearing 3D glasses, you feel as though you are caught up in the story which is showing around you.

A. seated

B. be seated

C. to sit

D. have been sitting

答案：

(答案→)A. seated

B. be seated

C. to sit

D. have been sitting

解析：考查分词转换的形容词用法。动词seat使…就坐；能容纳；它的过去分词转换的形容词seated表示就坐的状态。可以修饰名词，对主语的情况进行说明。句意：一旦坐在剧院里，带上3D眼睛，你就会感觉到你身临一个发生在你身边的故事。故A正确。