问题
选择题
----- Hi, Tracy, you look tired.
------ I ________ the living room for three hours.
A．painted
B．had painted
C．was painting
D．have been painting
答案
答案：D
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。