问题
选择题
The 2010 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
答案：B
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.