The reason he was late was he got up lateA. which becauseB. why thatC. that thatD. wh

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。