–----- Have you been to the Great Wall?
------ Perhaps not in my memory. _______, it might have been during my early childhood.
A. If only B. If so C. If ever D. If not
–----- Have you been to the Great Wall?
------ Perhaps not in my memory. _______, it might have been during my early childhood.
A. If only B. If so C. If ever D. If not
C