he insisted that ( )he nothing wrong and ( )freeA should do;set B had done;set C had done;be set D did;was set

问题描述:

he insisted that ( )he nothing wrong and ( )free
A should do;set B had done;set C had done;be set D did;was set

选C insist表示就“坚持说,坚持声称”时,从句用正常的失态;表示“坚持要求”时,从句用虚拟语气,形式是(should)+动词原形,should可省略
这句意思是“他坚持说自己没有做错(做错事发生在insist之前,用过去完成时),并坚持要求自己被释放(虚拟语气)”