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Do you know ___________?

A. when will he be back  B. when he will be back  C. where did he go  D. where will he go

Do you know ___________?

A. when will he be back                 B. when he will be back

C. where did he go                      D. where will he go

Do you know ___________?

A. when will he be back                 B. when he will be back

C. where did he go                      D. where will he go

Could you please tell _____?

A．when will he be back                    B．that he will be back

C．where did he go                        D．where he went