He spent too much time talking on phone while we were all busy at work.A. the; /B. a; /C

网友回答

(答案→)A. the; /
B. a; /
C. /; /
D. the; the
解析：句意为：当我们都忙着工作的时候，他打电话花费了太多的时间。此题属于对两个固定短语中冠词的考查，on the phone意为在打电话,at work意为工作。所以答案为A。