The old sick lady entered the hospital, her two sons.
A. to support
B. supporting
C. supported by
D. having supported
网友回答
A. to support
B. supporting
(答案→)C. supported by
D. having supported
解析：考察非谓语动词.句意:这位生病的老妪在两个儿子的搀扶下进了医院.过去分词表示被动的发生过的动作,和句子主语是动宾关系,结合语境可知选C.