问题补充:
The reason he was late was he got up late
A. which , because
B. why , that
C. that, that
D. why ,because
答案:
A. which , because
(答案→)B. why , that
C. that, that
D. why ,because
解析:考查定语从句和表语从句。本题第一空why引导定语从句,修饰先行词the reason;当先行词是reason,且后面的定语从句很完整的时候,使用关系副词why;第二空是that引导的表语从句,that在句中不充当任何成分,只起引导作用。句意:他迟到的原因是他起床晚了。故B正确。