The reason ...is that 中的that能否省略 为什么?

The reason ...is that 中的that能否省略 为什么? the reason is that中THAT可否省略 为什么This is the reason （that） he is late that the driver was drunk is obvious 句首的that 能否省略? It is likely that...的that能否省略? 请问the reason that teenagers take risk is not a problem中的that 关于the reason ...is beacause/that the reason why...is that...造句 带汉译 That,is,the,reason,求汉语 That is the reason why 是指... This is the reason that he told me.为什么这里的that不可省? This is the reason that he gave to me.w为什么只能用that