around Tian’anmen Square the tourists were taken to visit the Palace Museum. A. Showing

问题补充：

around Tian’anmen Square, the tourists 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

D. Having been shown

解析：the tourists与show是被动关系，show发生在谓语之前，用完成式。