The house is dirty because it since they moved out.
A. doesn’t clean
B. isn’t cleaned
C. hasn’t cleaned
D. hasn’t been cleaned
网友回答
A. doesn’t clean
B. isn’t cleaned
C. hasn’t cleaned
(答案→)D. hasn’t been cleaned
解析：考查时态：句意：房子很脏，因为自从他们搬出去了一直没有被打扫。时间状语是since连接的时间状语从句，和现在完成时连用，因为the house和clean是被动关系，用现在完成时的被动。选D。