---- Where is mother?
---- She is in the kitchen. She the housework all morning.
A. was doing
B. has done
C. has been doing
D. is doing
网友回答
A. was doing
B. has done
(答案→)C. has been doing
D. is doing
解析：考查时态。根据all morning整个上午，可知应该使用现在完成进行时。句意：—你妈妈在哪里？—她再厨房。她一直在做家务。