around the Tian An’ men Square the tourists from Iceland were taken to visit the Palace

问题补充：

around the Tian An’ men Square, the tourists from Iceland were taken to visit the Palace Museum.

A. Showing

B. Having shown

C. Being shown

D. Having been shown

答案：

A. Showing

B. Having shown

C. Being shown

(答案→)D. Having been shown

解析：非谓语动词辨析题。现在分词的完成被动式Having been shown与主语the tourists为被动关系，时间上表完成。“游客们参观了天安门广场后，又去参观了故宫博物院。”