He is the lawyer who you took photos ____ you were in the Forbidden City.

A. when       B. of when      C. where     D. of where

He is the lawyer who you took photos ____ you were in the Forbidden City.

1. A.
   when
2. B.
   of when
3. C.
   where
4. D.
   of where

He is the lawyer who you took photos ____ you were in the Forbidden City.

A. when       B. of when      C. where     D. of where

He is the lawyer who you took photos ____ you were in the Forbidden City.

A. when       B. of when      C. where     D. of where