The father stood up in order to protect his 15-year-old son, saying that he was not the one .
A.blamed
B.blaming
C.to blame
D.being blamed
网友回答
C解析考查不定式作定语。短语： 应受责怪be to blame,句意：父亲站起来为了保护他十五岁的孩子，说他不是受责怪的那个人。to blame作后置定语修饰the one，相当于定语从句who was to blame,所以选C。