请问一道英语题2012.12.30.3117、27._____ you don't know the rule won't be a sufficient excuse for your failure.A.It isB.ThatC.BecauseD.What请问这道题怎么答,为什么啊

问题描述:

请问一道英语题2012.12.30.31
17、27._____ you don't know the rule won't be a sufficient excuse for your failure.
A.It is
B.That
C.Because
D.What
请问这道题怎么答,为什么啊

that 引导的主语从句~

That.
主语从句,that代替从句you don't the rule.

应该选B
记得好像学过That引导的主语从句,它在从句中不占句子成分,不用翻译,起引导作用!