题干
All parents are willing to risk ________ their lives to save ________ of their children when a disaster is approaching.
A：losing; that
B：to lose; those
C：losing; those
D：having lost; the one
答案(点此获取答案解析）
C
。”结合所学知识，完成各题。
种退化，体质下降
来火山地震频发
