Mr. Green stood up in defence of the 16-year-old boy saying that he was not the one . A.

问题补充：

Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one .

A. blamed

B. blaming

C. to blame

D. to be blamed

答案：

A. blamed

B. blaming

(答案→)C. to blame

D. to be blamed

解析：考查非谓语动词作定语。现在分词作前置定语；动词不定式可以作定语，常后置，这里用不定式作定语，修饰the one；不定式作定语，常用主动表被动，故选C。