The reason why he did it was not clear.这句话why引导的是什么从句我认为是同位语从句 对么？

He wants to know the reason why,为何用why,reason是状He wants to know the reason why,为何用why,reason是状语吗,为什么 He continued_____(explain) the reason why he was late I don't know __.A.the reason why can be B.why the reason may beC.what theIs Mr.Wu from Beijing?I don't know ________.A.where does he come from B.from where does he comeC.which city he comes from D.what city he comes from 为什么不选DI don't know The reason why he was late was true . 改错:the reason why he is always late for class the reason that和the reason why the reason why与 the reason the reason why he doesnt come to school is not clear. 为啥有了reason 还要用why呢? the reason why he told me that he lost the money... The reason why he was late was that he was held up in the traffic jam. The reason why he was late was that he was held up in the traffic jam. the reason why 的用法 The reason ＿he didn't come was ＿ he was ill .A、why ,that B、 The reason why he didn't go to school is that he was ill.是什么从句? The reason why he didn,t come was（The reason why he didn,t come was（ ）（他病了） the reason that the reason why 的区别 the reason that he was late was unknown 对么 求通俗易懂的解释 55,He doesn't know ( ) why she is angry.A,reason B,a reason C,the reasons 不知选哪个 The ()for which he wanted to()with them is still unknown.a.reason;cause c.reason;reasonanswer:c and why?