.-The presidents of China and the USA had interview a short time ago.-- And it was

问题补充：

.---- The presidents of China and the USA had interview a short time ago.

---- And it was great success.

A. an; /

B. the; a

C. an; a

D. the; /

答案：

A. an; /

B. the; a

(答案→)C. an; a

D. the; /

解析：——句意：中国主席和美国总统之前有一个短时间的会谈。——这是一个重大的成功。interview是一个以元音因素开头的单词，故第一空填an ；great是一个以辅音音素开头的单词，因此第二空填a，故选C。