—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
Barbara is easy to recognize as she’s the only one of the women who ______ evening dress.
#99939
A
wear
B
wears
C
has worn
D
have worn
.--- I hear you__________at Smith’s. --- Yes, I__________there for about three months.
#103871
A
work; had been working
B
worked; was working
C
are working; have been working
D
worked; have worked
By the time these books were published, he _____ addicted to them.
#102731
A
had become
B
becomes
C
has become
D
became
Nearly half a million immigrants，many of them English—speaking， in the country during the last quarter of the nineteenth century．
#102171
A
have arrived
B
had arrived
C
arrived
D
have been arriving
I ________ him for a foreigner. Why didn’t you tell me earlier?
#103673
A
have taken
B
took
C
take
D
had taken