is unknown to us all.A. Where did he get itB. Where he got itC. That where he gotD. Which

问题补充：

is unknown to us all.

A. Where did he get it

B. Where he got it

C. That where he got

D. Which he got it

答案：

A. Where did he get it

(答案→)B. Where he got it

C. That where he got

D. Which he got it

解析：考查名词性从句。根据句意应当用where应当主语从句，并用陈述语序。句意：他在哪里得到它的我们还都不知道。