Parents now believe that there are obvious differences in their approach to educating children compared with _____ of their parents.   

A．those

B．that

C．one

D．ones

李大钊在《圆明园故址》一诗中写道：“圆明两度昆明劫，鹤化千年未忍归。一曲悲笳吹不尽，残灰犹共晚烟飞。”圆明园首度遭劫发生在[ ]

A．鸦片战争中

B．第二次鸦片战争中

C．甲午中日战争中

D．八国联军侵华战争中