After three years of preparation for the 2011 Xi’an International Horticultural Expo (西安园博)
会），the city is presenting the world many people think is the green Special Olympics．
A. that
B. which
C. what
D. where
网友回答
A. that
B. which
(答案→)C. what
D. where
解析：本题名词性从句。题中是一个宾语从句，从句中is the green Special Olympics缺少主语，所以用what。故选C。