问题补充：
around the Water Cube, we were then taken to see the Bird’s Nest for the Olympic Games.
A. Having shown
B. To be shown
C. Having been shown
D. To show
答案：
A. Having shown
B. To be shown
(答案→)C. Having been shown
D. To show
解析：非谓语动词作状语，其逻辑主语就是主句的主语。show与We为被动关系，且发生在主句谓语动词之前，应该用完成式。故选C，现在分词的完成被动式。意思是：我们在被带领着参观了水立方后，又被带去参观为奥运会准备的“鸟巢”
