The reason he was late was he missed the bus.
A. why, that
B. why, because
C. that, why
D. because, why
网友回答
(答案→)A. why, that
B. why, because
C. that, why
D. because, why
解析：考查定语从句和表语从句，第一空后是要定语从句，the reason 为先行词，在从句中作状语，表原因，故用why。第二空 that引导的是表语从句，这时候一般不省略。that在引导名词性从句的时候(主语、宾语、表语、同位语从句)，都没有实际意义，只作引导词，但是只有宾语从句中的that被省略。