-- Have you been to the Great Wall?

-- Perhaps not in my memory. _______, it might have been during my early childhood.

A. If any              B. If ever                 C. If once                 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 any    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 any            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

1. A.
   If any
2. B.
   If so
3. C.
   If ever
4. 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 any            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

. –----- 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 any                                                 B. If ever                 

C. If once                                               D. If not