---I’m sorry to hear that some villagers got disabled in the earthquake.  

---That’s too bad, but ________.  [ ]

A. all is well that ends well

B. the darkest hour is nearest the dawn  

C. where there is life, there is hope

D. it is good to have friends in trouble

所有城轨车辆车体底架的前端都设有撞击能量吸收区，其上开有3排椭圆形卸载孔，通过产生较大的塑性变形，从而吸收纵向冲击能量。