you didn't know the rules won't be an excuse for your failure to report.A. ThatB. WhereC.

问题补充：

you didn know the rules won be an excuse for your failure to report.

A. That

B. Where

C. What

D. Why

答案：

(答案→)A. That

B. Where

C. What

D. Why

解析：考查主语从句。句意：不要把你不知道规则作为你报道失败的借口。that 引导陈述句作主语，that只起到连接的作用，不做成分，但that 不能省略。 What引导主语从句时在句时在从句中充当句子成分，如主语．宾语．表语，答案：A