No staff members were injured but one prisoner remained______tod

No staff members were injured but one prisoner remained______today with a suspected broken jaw.
A、hospitalize
B、hospitalized
C、hospitalizing
D、to hospitalize
【正确答案】：B
【题目解析】：remain用作联系动词时，指某人或某事物仍保持某种状态，意为“仍然；依旧”,“留；呆；住；待”，后面可接名词、代词、形容词、介词短语、分词作表语。句中hospitalize的意思是“把……送入医院治疗”，与one prisoner的关系是被动关系，所以我们选择过去分词hospitalized。