Is this museum ___ you visited a few days ago?
A. where
B. that
C. on which
D. the one
答案:D
解析:构成表语从句
译文:这就是你前几天参观的博物馆啊?
This museum is the one you visited a few days ago.
这就是你前几天参观的博物馆。
注释:you visited a few days ago做the one 的定语来修饰限制它
the one you visited a few days ago 整体做句子的表语