It_seen to be believed.A.has B has been C.has to be D.was

问题描述:

It_seen to be believed.A.has B has been C.has to be D.was

答案是C
这句话的意思是眼见为实(必须见到了才能相信),而have to 含有不得不,必须的意思.
seen 是过去分词,被看到,要用被动语态.