_____around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.
#97907
A
Having shown
B
To be shown
C
Having been shown
D
To show
推荐题目
Do you consider it any good _____ psychology?
#90747
A
to learn
B
to have learned
C
learning
D
having learned
_____such heavy pollution already, it may now be too late to clean up the river. 
#97852
A
Having suffered
B
Suffering
C
To suffer
D
Suffered
________ global energy safety, all the countries have been called on to take joint efforts .
#97844
A
Having ensured
B
Ensuring
C
To ensure
D
To have ensured