题文
—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 |
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—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 |
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