People think that opening ceremony of the 29th Olympic Games is great success. A. an; aB

问题补充：

People think that opening ceremony of the 29th Olympic Games is great success.

A. an; a

B. the; a

C. the; the

D. the; /

答案：

A. an; a

B. the; a

C. the; the

D. the; /

解析：第一空是特指，所以用the, 第二空success是指成功的一优缺点事。所以此处success是可数名词，应用不定冠词a。