问题
选择题
The 2010 World Expo _____ in Shanghai attracted more than 70 million visitors from home and abroad. [ ]
A. holding
B. held
C. to be held
D. to have been held
答案
答案：B
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The 2010 World Expo _____ in Shanghai attracted more than 70 million visitors from home and abroad. [ ]
A. holding
B. held
C. to be held
D. to have been held
答案：B