问题
选择题
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
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。