They have no idea at all .
A. where has he gone
B. where did he go
C. which place he has gone
D. where he has gone
网友回答
A. where has he gone
B. where did he go
C. which place he has gone
(答案→)D. where he has gone
解析： 考查宾语从句的语序。宾从要用陈述语序，排除A和B。而C项要改为which place he has gone to。所以选D。