The Shanghai Expo has had a major impact upon China. It is the first World Expo ______ in a developing country in the event’s 159-year history.
A.having been held
B.to hold
C.being held
D.to be held
网友回答
D解析这题考查不定式的被动做定语，当名词被序数词修饰时，用不定式修饰，the first World Expo和hold是被动关系，句意是：上海世博会对中国有重大影响。这是在159年的历史首次在发展中国家举行的世博会。选D。