―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

[　　]

-------- The window is dirty.
--------- I know. It __________ for weeks.

--The window is dirty.
----I know. It ______ for weeks.

---The window is dirty.
----I know. It ______ for weeks.