The reason why he has not come is _________(他的妈妈病了）

the reason why he doesnt come to school is not clear. 为啥有了re The reason （ ）he did not come is （ ） he was ill the reason why he has made such progress is that he has neve The reason why he didn't come is ____ he is tired. the reason why he failed in the examination is [ ]he had not 改错 the reason why he didn´t come today is because his m The reason why he did it was not clear.这句话why引导的是什么从句 The reason why he didn,t come was（ not know the reason why的意思 Do you know the reason why/for which he didn't come?这句话的意思? 我不知道他为什么没有来：I do not know the reason why he did not show up 改错:the reason why he is always late for class