—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.
#102056
A
have visited
B
visited
C
had visited
D
had been visiting
推荐题目
Miss Jones _______ music at Bardon School for five years when she was abroad and now she is an actress.
#102222
A
taught
B
has taught
C
had taught
D
has been teaching
Enough______ to stop the forest______ since the 1980’s.
#104373
A
has been done;be cut down
B
has done;cutting down
C
has been done;being cut down
D
had done;from being cut down
---Now, have you finished your work yet?--- Yes, I _______ it when you came.
#102162
A
have finished
B
finish
C
had finished
D
would finish
The news came as no surprise to me. I _____ for some time that the factory was going to shut down.
#104998
A
had known
B
knew
C
have known
D
know