Could you please tell ?A. when will he be backB. that he will be backC. where did he goD.

问题补充：

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

答案：

A. when will he be back

B. that he will be back

C. where did he go

(答案→)D. where he went

解析：句意：你能告诉我他去哪里了吗？宾语从句用陈述句的语序，同时根据句意可知，故选D