问题补充：
The World Expo in Shanghai successfully. It was an honor of all
of the Asians.
A. is held
B. was held
C. has been held
D. would be held
答案：
A. is held
(答案→)B. was held
C. has been held
D. would be held
解析：根据successfully成功的以及下文，可知上文叙述的事情已经发生，所以应为过去时态。这里强调的是世界博览会举行过了，所以选B.
