— We haven't been to the Great Wall for ages.
— No, I don't remember how many years ago I last visited it.
A. it was that
B. was it that
C. it was when
D. was it when
网友回答
(答案→)A. it was that
B. was it that
C. it was when
D. was it when
解析：考查强调句型。强调句型的最大特点是把它的it is/was…that/who去掉，句子仍然是对的。本题考查的强调句型的特殊疑问句装换成的特殊疑问句。本句=I don't remember how many years ago I last visited it.