单项选择题

--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
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单项选择题
I often see lights in that empty house. Do you think I ______ report it to the police
A．should
B．may
C．will
D．can
单项选择题
It is hard for me to imagine what I would be doing today if I______ in love at the age of seven, with the library in my hometown.
A．wouldn't have fallen
B．should not fall
C．had not fallen
D．were not to fall
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