The reason why he was late is he got up too late.A. thatB. becauseC. asD. for

问题补充：

The reason why he was late is he got up too late.

A. that

B. because

C. as

D. for

答案：

(答案→)A. that

B. because

C. as

D. for

解析：句意：为什么他迟到的原因是因为他起床太晚了。the reason why …is that…为什么的原因是因为，that引导的是表语从句，注意此处不能用because不能受中文的影响。故选A