【题目】The reason _______ he was fired was _______ he was often late with his work.
A.which; thatB.that; becauseC.why; becauseD.why; that
在线课程【答案】D
【解析】
考查定语从句和表语从句。句意：他被解雇的原因是他经常工作迟到。
名词reason作先行词，在后面的定语从句中做原因状语，由why引导定语从句；名词reason作主语，后面的表语从句句意和句子结构完整，所以由that引导表语从句。故选D。