Do you know when he will be coming back?Do you know when he

--when will he come back,do you know? ( )6.- Do you know when he will come back - ____ . Do you know ----------he will be back.that或if, A;Do you know when he will come back?B;----(A,Till a week B. 三道英语 ：1 Do you know when he will come back Do you know when he will ______ here?选项以下 Do you know when he was born Do you know when he came here? Do you know when he ( )Lucy? .--Do you know when he ___ back --Sorry ,I don”t .When he __ do you know?when will he be back?(将上述两句合并成含宾语从句的复合句) do you Do you know when he----?When he -----,please call me.