The moment the 28th Olympic Games open, the whole world cheered.
A. declared
B. have been declared
C. have declared
D. were declared
网友回答
A. declared
B. have been declared
C. have declared
(答案→)D. were declared
解析：
试题分析:考查动词时态。the moment 引导时间状语从句，意思是“一……就”，和后面句子动作同时发生，所以用一般过去时，故答案选D。句意：当第28届奥林匹克运动会宣布开幕时，整个世界都欢呼了。