单选题Our father often told&nbs

问题补充：

单选题Ourfatheroftentoldusinthepastthat_____isbelieving.A.to seeB.seeingC.seeD.to be seen

答案：

B解析当表语是非谓语动词时，主语应与之保持平行。在此句等于：To see is to believe.