The twin brothers showed great ________to their elder sister, who had acted as sole parent to them since their parents died during the American Civil War.
句意：那对双胞胎兄弟非常爱他们的姐姐，他们的父母在内战中去世后，是她在家中扮演了家长的 角色。devotion热爱，献身。compliance顺从，服从。allegiance拥护，效忠。subjection绝对服从，隶属。