He must have gone out. I heard the noise of the door ______when I was still in bed.
#97057
A
being locked
B
to lock
C
locking
D
having locked
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David apologized for ______ to inform me of the change in the plan.
#98637
A
his being not able        
B
him not to be able
C
his not being able        
D
him to he not able