The city of Qingdao has been working on
题型:选择题
问题:
The city of Qingdao has been working on building itself up as a city of sails ________ it successfully hosted the 2008 Olympics’ sailing program.
A.after
B.since
C.when
D.until
The city of Qingdao has been working on building itself up as a city of sails ________ it successfully hosted the 2008 Olympics’ sailing program.
A.after
B.since
C.when
D.until