____around the Water Cube, we were then taken to see the Birds’ Nest for the 2008 Olympic Games.

A．Having shown

B．To be shown

C．Having been shown

D．To show

套汇交易包括（）。

A.时间套汇

B.地点套汇

C.利息套汇

D.环境套汇

E.人物套汇