He was caught stealing in the supermarket.But that was kept a secret never coming to the o

问题补充：

He was caught stealing in the supermarket.But that was kept a secret,never coming to the of his family.

A. mind

B. idea

C. knowledge

D. thought

答案：

A. mind

B. idea

(答案→)C. knowledge

D. thought

解析：knowledge意为“得知，知道”，他偷东西的事永远也没让他的家人知道。