问题描述：
hi,tracy,you look tired i am tired
--Hi,Tracy,you look tired.--I am tired.I_____the living room all day.A .painted
B .had painted
C .have been painting
D .have painted
为什么?
--Hi,Tracy,you look tired.--I am tired.I_____the living room all day.A .painted
B .had painted
C .have been painting
D .have painted
为什么?
问题解答：
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