--- Do you know him?
--- Yes, but I can’t remember ______I met him for the first time.
A. where   B. what     C that         D. if

--- Do you know him?

--- Yes, but I can’t remember ______I met him for the first time.

A. where   B. what     C that         D. if

--- Do you know him?

--- Yes, but I can’t remember ________I met him for the first time.

A. where           B. what            C that               D. if

--- Do you know him?
--- Yes, but I can’t remember ______I met him for the first time.

1. A.
   where
2. B.
   what
3. C.
   that
4. D.
   if

--- Do you know him?

--- Yes, but I can’t remember ________I met him for the first time.

A. where           B. what            C that               D. if