When ____ in terms of the long history of the World Cup,this year’s edition is sure ____ a significant turning point
问题描述：
When ____ in terms of the long history of the World Cup,this year’s edition is sure ____ a significant turning point
A.seeing; of being B.seeing; to be C.seen; of being D.seen; to be
答
D
see后面没有宾语,用被动式,逻辑主语是edition,
be sure to be一定是
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