—The window is dirty. —I know. It ______
问题:
—The window is dirty.
—I know. It ______ for weeks.
A.hasn’t cleaned
B.didn’t clean
C.wasn’t cleaned
D.hasn’t been cleaned
—The window is dirty.
—I know. It ______ for weeks.
A.hasn’t cleaned
B.didn’t clean
C.wasn’t cleaned
D.hasn’t been cleaned