No one knows when he will be back

No one knows when he will be back NO one knows when we will start tomorrow. When will he be back when will he come back When he came bac 为啥I have no idea when he will be back是同位语从句 I have no idea when he will be back速度点 高手进! One who knows when to be speak will also know when to be sil l have no idea when he will be back这为什么是同位语从句?我觉得是定语从句. no one knows when i am not no one knows what will happen（） The meeting _______ for five hours.No one knows when it will 复合句方面.I’m afraid no one knows( )A.When will the football gam 为什么 选这个1.It ____for 5 days and no one knows when it will sto