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

问题补充：

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

A. blamed

B. blaming

C. to be blamed

D. to blame

答案：

A. blamed

B. blaming

C. to be blamed

(答案→)D. to blame

解析：sb be to blame固定结构“某人该受到责备”。因此本题选D。