He was about halfway through his meal           a familiar voice came to his ears.

A. why              B. where            C. when         D. while

He was about halfway through his meal ________ a familiar voice came to his ears.

A. why 　　　　 B. where 　　 C. when 　　　 D. while

He was about halfway through his meal           a familiar voice came to his ears.

A.why              B.where                          C.when                   D.while

He was about halfway through his meal _________ a familiar voice came to his ears.
    A．when                  B．where                  C．as                       D．while 

He was about halfway through his meal ______ a familiar voice came to his ears.

   A. why       B. where     C. when      D. while

 He was about halfway through his meal ____ a familiar voice came to his ears.

A.why                        B. where                            C. when                             D. while

He was about halfway through his meal ____ a familiar voice came to his ears.

A.why                        B. where                            C. when                             D. while

He was about halfway through his meal ________ a familiar voice came to his ears．

1. A.
   why
2. B.
   where
3. C.
   when
4. D.
   while