The reason he was late for the meeting was his little son fell ill this morning.
A. for,that
B. why,that
C. for,because
D. why,because
网友回答
A. for,that
(答案→)B. why,that
C. for,because
D. why,because
解析：考查定语从句和表语从句。本题的第一空是一个定语从句，对先行词the reason的情况进行修饰限制，后面句子的结构很完整，就使用关系副词的形式。第二空是一个that引导的表语从句，that在句中不充当任何成分，只是一个引导词而已，构成The reason is that…原因是…；句意：他开会迟到的原因是他的小儿子今天上午生病了。故B正确。