She is often seen ______ the old woman.  
#50014
A
help
B
helping
C
to help
D
help to
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Sir, would you mind not _____ here, please?
#49378
A
to smoke
B
smoke
C
smoking
D
smoked
You had better _____your hands before meads.
#50213
A
wash
B
to wash
C
not wash
D
will wash