My sister was very unhappy for to the party.
A. having not been invited
B. not having invited
C. having not invited
D. not having been invited
网友回答
A. having not been invited
B. not having invited
C. having not invited
(答案→)D. not having been invited
解析：句意，我姐姐很不开心因为她没有被邀请去参加聚会。由此可见，聚会已经开始或者已经结束了，而“邀请”这个动作是发生在“不高兴”之前，并且对现在（即姐姐的心情）有影响，因此要用现在分词的完成时的被动式。对于“没有”，表示否定，not必定放在此类结构最前面，故选择D。