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

________ around Tian' anmen Square, the tourists were taken to visit the Palace Museum.

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________ around Tian' anmen Square, the tourists were taken to visit the Palace Museum.

[　　]

________around Tian'anmen Square, the tourists were taken to visit the Palace Museum.

[　　]