----- Hi, Tracy, you look tired.
------ I the living room for three hours.
A. painted
B. had painted
C. was painting
D. have been painting
网友回答
A. painted
B. had painted
C. was painting
(答案→)D. have been painting
解析：考察时态。根据时间状语for three hours和句意：—Tracy，你好，你看上去很累。—这三个小时来我一直在粉刷起居室。现在完成进行时强调动作的持续性和反复性。故D正确。