问题补充:
He didn’t tell me .
A. which floor did he live on
B. which floor he lived on
C. which floor he lived
D. Which he lived on the floor
答案:
A. which floor did he live on
(答案→)B. which floor he lived on
C. which floor he lived
D. Which he lived on the floor
解析:句意:他没有告诉我它住在哪一层。在宾语从句的位置上使用陈述句语序,不用疑问句语序,所以选B。