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
答案:D
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。