The reason he was late was he missed the bus.A. why thatB. why becauseC. that whyD.

问题补充：

The reason he was late was he missed the bus.

A. why, that

B. why, because

C. that, why

D. because, why

答案：

(答案→)A. why, that

B. why, because

C. that, why

D. because, why

解析：句意：他迟到的原因是他没有赶上火车。第一空是why引导的定语从句，why在定语从句中状语，先行词是reason；第二空是that引导的表语从句，that在表语从句中不做成分。固定句式The reason why……be that…,故选A。