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。