题目内容：

Tom said he was innocent and what he said_true
A proved. B was proved. C prove. D had been proved.

优质解答

D had been proved.汤姆说他是无罪的,他说的已经被证明是真的.
他的话被证明是真实的所以是proved,prove在句子里做谓语前面需要加be,故选D