The moment the 28th Olympic Games __ open,the whole world cheered.

问题描述:

The moment the 28th Olympic Games __ open,the whole world cheered.
A.declared B.have been declared C.have declared D.were declared
the moment可看做连词?

D,被动
28期奥林匹克比赛 刚一被公布开幕,全世界就欢呼起来了
对 在这句可以看作连词 连词连接一个句子