题目内容：

No one here believes the reason_he gave for his lateness A.that B.why C.for which D.what
为什么选A啊.请详解哦(⊙o⊙)

优质解答

首先,从句是修饰reason的定语从句,什么样的理由,迟到的理由,因此排除B和D选项.
再看先行词reason在从句中是做gave后的宾语,he gave (the reason) for his lateness,直接跟在gave后面就行,不用画蛇添足的 for,所以排除C,最终选A