It was really an achievement about the ceremony of the Beijing Olympic games ( )A to have been made B made C to make D making求解释,谢谢

问题描述:

It was really an achievement about the ceremony of the Beijing Olympic games ( )
A to have been made B made C to make D making
求解释,谢谢

B
北京奥运会的开幕式真一个很大的成功
北京奥运会都已经开完了,当然是过去时了,前面的was可以作为一个提示,其他都不对