you have seen it, I will tell you everything．A.BecauseB.ForC.AsD.Now that

________ you have seen it, I will tell you everything．

A.Because

B.For

C.As

D.Now that

试题答案

D

you have seen it显然不是为了真正解释I will tell you everything的原因，而是对主句动作之所以会发生的一种提示，是一种显而易见的理由，因此用now that。另外，for引导原因状语从句时不能用于句首。