— Can you come to my birthday party tonight? — I’d love to, but I______ on a patient at 6 o’clock.
#100074
A
will operate
B
am operating
C
will be operating
D
will have operated
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That Was the first time she     alone at home during the weekends,bored to death.
#102766
A
has left
B
has been left
C
had left
D
had been left
--The window is dirty.----I know. It ______ for weeks.
#101363
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned