51.there have been several new events ______ to the program for the 2008 Beijing Olympic Games.there have been several new events ______ to the program for the 2008 Beijing Olympic Games.A.add B.to add C.adding D.added

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51.there have been several new events ______ to the program for the 2008 Beijing Olympic Games.
there have been several new events ______ to the program for the 2008 Beijing Olympic Games.
A.add B.to add C.adding D.added

D
被动态

这是个there be 句型的变形式 ,这里应该选D

added . 主语的中心词是events 是物 要用过去分词。