After the earthquake the president a three-day period of mourning the first-ever event

问题补充：

After the earthquake, the president a three-day period of mourning, the first-ever event of its kind for ordinary people.

A. suffered

B. declared

C. confirmed

D. informed

答案：

A. suffered

(答案→)B. declared

C. confirmed

D. informed

解析：考查动词：A. suffered遭受，B. declared宣布，C. confirmed证实，D. informed通知，句意：地震后，总统宣布三天的哀悼，这是对于普通人的这种事情的第一次事件。选B。