He spent too much time talking on ______ phone while we were all busy at _____ work.

A. the, 不填           B. a, 不填  C. 不填, 不填        D. the, the

He spent too much time talking on ______ phone while we were all busy at _____ work.

A. the, 不填   B. a, 不填  C. 不填, 不填 D. the, the

He spent too much time talking on ______ phone while we were all busy at _____ work.

   A. the, 不填     B. a, 不填     C. 不填, 不填     D. the, the

He spent too much time talking on ______ phone while we were all busy at _____ work.

A. the, 不填   B. a, 不填 C. 不填, 不填   D. the, the

He spent too much time talking on _______ phone while we were all busy at _______ work.

A. the;  /                  B. a;  /                     C. /;  /             D. the;  the

He spent too much time talking on ______ phone while we were all busy at _____ work.

A. the, 不填     B. a, 不填              C. 不填, 不填      D. the, the

He spent too much time talking on ______ phone while we were all busy at _____ work.

A. the, 不填　　　　　　　　 B. a, 不填

C. 不填, 不填　　　　　　　　 D. the, the