问题描述：
Hard_Jack was_his son,his son risk_anything,even_his own life at stake_.
A though,on,would,todo,put
B as,on,volunteeredto,doing,putting
C aithough,for,will,todo,put
D that,at,was willing to,doing,put
为什么？
A though,on,would,todo,put
B as,on,volunteeredto,doing,putting
C aithough,for,will,todo,put
D that,at,was willing to,doing,put
为什么？
问题解答：
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