The Shanghai Expo has had a major impact upon China. It is the first World Expo in a deve

问题补充：

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：

A. having been held

B. to hold

C. being held

(答案→)D. to be held

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。