around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.
A. Having shown
B. To be shown
C. Having been shown
D. To show
网友回答
A. Having shown
B. To be shown
(答案→)C. Having been shown
D. To show
解析：“show”与“take”之间有明显的时间先后关系，且句子的主语与“show”构成逻辑上的动宾关系，故该空格处用完成式的被动形式。