【名词&注释】
脑脊液(cerebrospinal fluid)、自上而下、现在完成时(present perfect)、第一个(first)、刺激物(irritant)
[单选题]__________
根据以下内容,回答下面的题目。The death of a child, _51_ one’s own child,is something the mind can hardly comprehend.It seems togo _52_ nature.The end of a life that is still forming_53_ has just begun is an almost unthinkable cruelty.But it happens.Parents sometimes must witness the illness and death of the children_54_ whom they gave birth.And _55_ will ever fill theempty place that the dead child leaves behind.Parents_56_ to die before their children, which is the natural order of life events.When the situation is reversed and a child dies _57_ the parents itseems wrong.Yet we never know why one person dies andanother lives.But we do know _58_ a child is gone, theparents still have a future, as grey and worthless as it may at first seem.Death may take the child, but the love never _59_.The sorrow after a child’s death is one ofthe longest and hardest type of _60_ to live with.And ittakes long to deal with the parents’ own emotions.__________
A. at
B. with
C. to
D. for